Diptera 45 c 



one I have identified"!: have a shght doubt as to the correctness of my identifi- 

 cation because I have not the male before me, and it was from that sex that 

 the species was originally described. 



Key to Species. 



MALES. 



1. Halteres black or black-brown 2 



Halteres yellow 4 



2. Femora very distinctly thickened; eyes separated by width across posterior ocelli; sixth 



vein extending to margin of wing; hairs on thorax and abdomen thick 



erinacioides, n. sp. 

 Femora not appreciably thickened, little stouter than tibise; eyes contiguous or sub- 

 contiguous: sixth vein not extending to wing margin; hairs on thorax and abdomen fine 3 



3. Hind tarsi ^^•ith the basal joint thicker than tibise at apices, and very much thicker than 



basal joint of fore and mid tarsi; aU tibite and basal two joints of all tarsi with 



rather dense, long, fine haii's dorsally ursina, n. sp. 



Tarsi not as above, legs without long dense hairs on tibiae and basal two joints of all tarsi, 

 several of the hairs on basal joint of tarsi on all legs conspicuously stronger than 

 the others, bristle-like similaia, n. sp . 



4. Hairs of thorax and abdomen yellowish 'albopilosa Coquillett. 



Hairs on thorax and abdomen black conservativa, n. sp. 



FEMALES. 



1. Halteres black 2 



Halteres yellow 4 



2. Mid and hind femora with a series of squamulse along the postero-ventral margins; basal 



joint of hind tarsi at least as thick as apices of tibiae; sixth vein extending to margin 



of wing herschelli, n.- sp. 



Femora devoid of squamulae, at most with hairs or bristles; sixth vein not extending to 

 margin of wing 3 



3. Tibise and tarsi with dense short hairs of uniform strength, which nowhere exceed in 



length the diameter of the part upon which they are situated ursina, n. sp. 



Tibiae and tarsi with sparse, stout bristles, many of which exceed in length the diameter 



of tibise or tarsi, those on dorsum of basal joint of tarsi very unequal in length 



similaia, n. sp. 



4. Ventral plate between bases of fore coxae with long pale hairs; hairs on thorax and abdo- 



men yellowish ■ albopilosa Coquillett? . . . 



Ventral plate between bases of fore coxae bare; hairs on thorax and abdomen black 



conservaliva, n. sp. 



Rhatnphomyia erinacioides, n. sp. 



Male. Black, subopaque. Wings sHghtly brownish, veins dark brown. 

 Halteres black-brown. Hairs on entire insect fuscous. 



Eyes separated by as great a width as distance across posterior ocelli; 

 antennae with basal two Joints subequal in length, third joint broad at base, 

 tapered from near base to apex, its entire length shghtly more than twic" its 

 greatest width and 1 -5 as great as first and second combined; apical style thick, 

 one-third as long as third joint; proboscis slender, tapered to apex, its entire 

 length equal to 1-5 the height of head; palpi short; occiput with long, rather 

 thick hairs. Dorsum of mesonotum covered with long, rather dense, upright, 

 thick hairs; ventral prothoracic plate between fore coxse bare, the portions of 

 thorax immediately above base's of fore coxaj with long hairs; hairs in front of 

 halteres numerous; scutellum with a closely set fringe of upright hairs along 

 posterior margin (24-30). Abdomen with dense erect stout hairs on entire 

 surface except on the hypopygium; hypopygium large, upper processes long, 

 directed cephalad over dorsum, as shown in PL VII, fig. 6, the filament not visible 

 except near base. Femora very noticeably thickened, tibiae and tarsi more slen- 

 der than usual; all femora with rather dense hairs, which are not so thick as 

 those on abdomen, hind pair with the ventral surfaces devoid of long hairs except 

 on basal third, beyond that with dense microscopic pile; all tibiae with short 

 hairs on dorsal surfaces and dense erect microscopic pile on ventral surfaces; 



