Diptera 299 



pp. Hair at the apex of the abdomen reddish 



yellow. Europe and America, 

 q. Tibiae and tarsi yellow; femora black 



H.lineata 



qq. Legs black with black hair; tips of 

 hind tibia and tarsi yellowish brown 



H. bovis 



oo. Palpi small, globular; tibiae cylindrical, 



straight. On reindeer 0. tarandi 



Oedemagena Latr. 



kk. Oral opening of the usual size; mouth parts not 



vestigial. 



1. Hypopleurals wanting; if three sternopleurals are 



present the arrangement is 1:2; conjunctiva 



(fig. i6ic) of the venter usually present; if the 



terminal section of Mi+2 is bent it has neither fold 



nor appendage (ANTHOMYHDJE of Girschner). 



m. Sternopleurals wanting; Mi+2 straight toward 



the apex, costa ends at or slightly beyond the 



tip of R4+5', mouth parts vestigial 



GASTROPHILIN.E. See OESTRID>E 



mm. Sternopleurals present, if rarely absent then 



differing in other characters. 



n. Caudal margin of the fifth ventral abdominal 

 sclerite of the male deeply notched on the 

 median line usually to beyond the middle; 

 abdomen often cylindrical or linear; abdomen 

 often with four to eight spots; eyes of the 

 male usually widely separated; sterno- 

 pleurals three, arranged in an equilateral 

 triangle; subapical seta of the hind tibia 

 placed very low; Mi+2 straight; anal vein 

 abbreviated; wings not rilled. Ccenosia, 

 Caricea, Dexiopsis, Hoplogaster, Schcsno- 



myia, etc. (CCENOSIN^;)* 



ANTHOMYIID^E in part 



nn. Caudal margin of the fifth ventral abdominal 

 sclerite of the male incurved, rarely deeply 

 cleft, rarely entire, in a few genera 

 deeply two or three notched; Mi-f2 straight 



*There are several genera of flies of the family Cordylurida (i.e. Acalyptratce) which might be 

 placed with the Anthomyiida (i.e. Calyptratce) , owing to the relatively large size of their squamae. 

 As there is no single character which will satisfactorily separate all doubtful genera of these two 

 groups we must arbitrarily fix the limits. In general those forms on the border line having a 

 costal spine, or lower squama larger than the upper, or the lower surface of the scutellum more 

 or less pubescent, or the eyes of the male nearly or quite contiguous, or the eyes hairy, or the 

 frontal setae decussate in the female; or any combination of these characters may at once be 

 placed with the Anthomyiidce. Those forms which lack these characteristics and have at least 

 six abdominal segments (the first and second segments usually being more or less coalescent) 

 are placed with the Acalyptrates. There are other acalyptrates with squamae of moderate size 

 which have either no vibrissas, or have the subcosta either wholly lacking or coalescent in large 

 part with R lt or have spotted wings; they, therefore will not be confused with the calyptrates. 



