314 Hominoxious Arthropods 



much elongate. A. luteola (fig. 86). Africa. The sub- 

 genus Chwromyia'R.ouh. is included here. AuchmeromyiaB.B. 

 hh. Peristome narrow; no pteropleurals, two sternopleurals; 

 two orbitals in the female; second segment not elongate; 

 the fourth with two well developed discal macrochaetas. 



B. depressa. Africa Bengalia R. D 



gg. With another combination of characters. 



h. Costal spine present; body in part black; antenn» notice- 

 ably shorter than the epistome, inserted above the middle 

 of the eye and separated from each other by a carina; 

 abdominal segments with marginal macrochaetas; sterno- 

 pleurals 2 :i or I :l Paratricydea Villen. 



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

 different, 

 i. Genae with several ranges of microchatae; vibrissal ridges 

 strongly converging; peristome broad; arista moderately 

 plumose; sternopleurals usually 1:1; color entirely 

 testaceous. C. anthropophaga (fig. 87) and grunbergi. 



Africa Cordylobia Griinb. 



ii. Genas 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.* 



kk. Sternopleurals 1:1. P. varia Hough. Africa 



Parochromyia Hough 



jj. Genae bare. 



k. Basal section of R4+5 bristly only at the immediate 

 base, distal section with a broad curve; distal 

 portion of the abdomen metallic; sternopleurals 

 usually I :i. rarely 2:1. M. ceneiventris Wd. Tropic 



America Mesembrinella. G. T. 



kk. R4+6 bristly at least nearly half way to the small 

 crossvein; sternopleurals 1:1. 



I. Macrochaetas of the abdomen marginal; neither sex 



with orbitals; no carina between the base of the 

 antennas; three pairs of presutural inner dorso- 

 centrals. Eastern hemisphere. T. ferruginea. 

 Tricyclea V. d. W. ( = Zonochroa B. B. according 

 to Villeneuve 1914). 



II. Abdomen without macrochaetae; wing usually with 



a marginal streak and gray markings. Brazil 

 Hemilucilia B. B. 



*Plinlhomyia Rdi. and Hemigymnochxta Corti are related to Ochromyia. though too briefly 

 described to place in the key. 



