Handbook of Medical Entomology Part 46

kk. Hypopygium of the male without style. _A.

stelviana_ B. B. _Acrophaga_ B. B.

hh. Arista usually plumose nearly to the tip; posterior dorsocentrals and inner dorsocentrals (acrostichals) well developed; dorsal surface of the squamula thoracalis hairy; abdomen metallic and usually pollinose; genae hairy.

i. With one pair of ocellar macrochaetae. C. VOMITORIA, ERYTHROCEPHALA, VIRIDESCENS, and related species.

Both hemispheres. CALLIPHORA R. D.

ii. With two strong pairs of ocellar macrochaetae. _E.

latifrons._ Pacific slope of the U. S.

_Eucalliphora_ Town.

ff. First section of R_{4+5} bristly near or quite half way to the small crossvein; dorsal surface of the squamula thoracalis is bare; the hypopygium of the male is inconspicuous.

g. Genae bare; posterior inner and outer dorsocentrals distinct and well developed. _L. caesar_, _sericata_, _sylvarum_, and related species. Widely distributed in both hemispheres (fig. 103). LUCILIA R. D.

gg. Genae with microchaetae, at least down to the level of the base of the arista.

h. Mesonotum flattened behind the transverse suture.

i. Posterior dorsocentrals inconstant and unequally developed; one pair of posterior inner dorsocentrals. _P. terraenovae._ North America.

_Protophormia_ Town.

ii. Posterior dorsocentrals well developed, the inner dorsocentrals (acrostichals) unequally developed.

_P. azurea_, _chrysorrha_, etc. Europe and America.

_Protocalliphora_ Hough

hh. Mesonotum not flattened behind the transverse suture; posterior inner and outer dorsocentrals inconstant and unequally developed. _P. regina._ Europe and America.

_Phormia_ R. D.

ee. Species more or less rufous or yellow in color.

f. Anterior dorsocentrals wanting; first section of the R_{4+5} at most only bristly at the base, bend near apex of M_{1+2} rectangular, R_1 ends over the crossvein; fronto-orbital macrochaeta absent; eyes of the male contiguous. _C. semiviridis._ Mexico. _Chloroprocta_ V. d. W

ff. With another combination of characters.

g. Body robust, of large size, abdomen elongate, not round; genae with several ranges of microchaetae; vibrissal ridges strongly convergent; abdomen with well developed macrochaetae; costal spine usually absent; eyes of the male widely separated.

[Ill.u.s.tration: 171. Stigmata of the larvae of Muscoidea. Third instar.

(_a_) Cynomyia cadaverina; (_b_) Phormia regina; (_c_) Chrysomyia macellaria; (_d_) Musca domestica; (_e_) Sarcophaga sp.; (_f_) Oestris ovis; (_g_) Gastrophilus equi; (_h_) Sarcophaga sp.; (_i_) Pegomyia vicina; (_j_) Protocalliphora azurea; (_k_) Hypoderma lineata; (_l_) Muscina stabulans. Magnification for f, g, and k, 25; all others, 50.]

h. Peristome broad, pteropleural macrochaetae distinct; one or two sternopleurals; in the female a single orbital macrochaeta; last abdominal segment without discal macrochaetae; hypopygial processes of the male with a long stylet; second abdominal segment of the female sometimes much elongate. A. LUTEOLA (fig. 86).

Africa. The sub-genus _Chromyia_ Roub. is included here. AUCHMEROMYIA B. B.

hh. Peristome narrow; no pteropleurals, two sternopleurals; two orbitals in the female; second segment not elongate; the fourth with two well developed discal macrochaetae. B. DEPRESSA. Africa.

BENGALIA R. D

gg. With another combination of characters.

h. Costal spine present; body in part black; antennae noticeably shorter than the epistome, inserted above the middle of the eye and separated from each other by a carina; abdominal segments with marginal macrochaetae; sternopleurals 2:1 or 1:1. _Paratricyclea_ Villen.

hh. Costal spine not distinct, or if present, insect otherwise different.

i. Genae with several ranges of microchaetae; vibrissal ridges strongly converging; peristome broad; arista moderately plumose; sternopleurals usually 1:1; color entirely testaceous. C. ANTHROPOPHAGA (fig.

87) and GRUNBERGI. Africa. CORDYLOBIA Grunb.

ii. Genae bare or with but one range of setae; vibrissal ridges less converging; peristome narrow; arista long plumose.

j. Genae with a single row of microchaetae.

k. Sternopleurals 2:1; color entirely testaceous.

_Ochromyia_ Macq.[P]

kk. Sternopleurals 1:1. _P. varia_ Hough. Africa.

_Parochromyia_ Hough

jj. Genae bare.

k. Basal section of R_{4+5} bristly only at the immediate base, distally M_{1+2} with a broad curve; distal portion of the abdomen metallic; sternopleurals usually 1:1, rarely 2:1. _M.

aeneiventris_ Wd. Tropic America.

_Mesembrinella._ G. T.

kk. R_{4+5} bristly at least nearly half way to the small crossvein; sternopleurals 1:1.

l. Macrochaetae of the abdomen marginal; neither s.e.x with orbitals; no carina between the base of the antennae; three pairs of presutural inner dorsocentrals. Eastern hemisphere. _T.

ferruginea._ _Tricyclea V. d. W_. (= _Zonochroa_ B. B. according to Villeneuve 1914).

ll. Abdomen without macrochaetae; wing usually with a marginal streak and gray markings. Brazil.

Hemilucilia B. B.

[Ill.u.s.tration: 172. Left hand stigmata of the larvae of muscoidea. Third instar. (_a_) Lucilia caesar; (_b_) Calliphora vomitoria; (_c_) Stomoxys calcitrans; (_d_) Orth.e.l.lia cornicina; (_e_) Pyrellia cadaverina; (_f_) Haematobia irritans; (_g_) Mesembrina mystacea; (_h_) Mesembrina meridiana; (_i_) Myospila meditabunda; (_j_) Mydaea urbana; (_k_) Polietes albolineata; (_l_) Polietes lardaria; (_m_) Morellia hortorum; (_n_) Hydrotaea dentipes; (_o_) Hebecnema umbratica; (_p_) H. vespertina; (_q_) Limnophora septemnotata; (_r_) Muscina stabulans. (_a_ and _b_) after MacGregor; (_d_) after Banks; all others after Portchinsky.

Magnification varies. The relative distance to the median line is indicated in each figure.]

SIPHONAPTERA. Fleas

Adapted from a table published by Oudemans.

a. Elongated fleas, with jointed (articulated) head, with combs (ctenidia) on head and thorax; with long, oval, free-jointed flagellum of the antenna (fig. 92d). Suborder FRACTIc.i.p.aTA

b. With ctenidia in front of the antennae and on the genae (cheeks); maxillae with acute apices; l.a.b.i.al palpi five-segmented, symmetrical; eyes poorly developed or wanting. On rodents.

HYSTRICHOPSYLLIDae

c. Abdominal segments without ctenidia.

d. Post-tibial spines in pairs and not in a very close set row; head with ctenidia. _Ctenophthalmus_ Kol.

dd. Post-tibial spines mostly single and in a close set row.

_Ctenopsyllus_ and _Leptopsyllus_. The last genus has recently been erected for _L. musculi_, a widely distributed species occurring on rats and mice.