Diptera 



one I have identified I have a slighi doubl as to the correctness of my identifi- 

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

 the species was originally described. 



Kky to Species. 



M \u;>. 



1. Halteres black or black-brown 



Halteres yellow j 



2. Femora very distinctly thickened; eye- separated by width across posterior ocelli' -i\tli 



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



. n. sp. 

 Femora not appreciably thickened, little stouter than tibiae; eye- contiguou ib- 



contiguous: sixth vein nol extending to wing margin; hairs mi thorax and abdomen fim 



3. Hind tarsi with the basal joint thicker than tibiae at apices, and very much thicker than 



basal joint of fore and mid tarsi; all tibiae and basal two joint- of all tarsi with 



rather dense, long, fine hairs dorsally ■,,!. q. 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 similala, a 



4. Hairs of thorax and abdomen yellowish aWopilosa Coquillett. 



Hairs on thorax and abdomen black cm 



1. Halteres black . •_> 



Halteres yellow 1 



2. Mid and hind femora with a series of squamulae 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 Ik rscfu lli, 



Femora devoid of squamnlte, at most with hair- or bristles; sixth vein not extending to 

 margin of wing 



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



length the diameter of the pari upon which they are situated wrsina, n -\i 



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

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



similala, n. sp 



4. Ventral plate between bases of fore coxie with long pale hairs; hairs on thorax and ab 



men yellowish albopilosa < loquillett? 



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



'-./ . n gp 



Rhamphomyia erinacioides, n. sp. 



Male. Black, subopaque. Wing- slightly brownish, veins dark brown. 

 Halteres black-brown. Hairs on entire insect fuscous. 



Eyes separated by as great a width as distance across posterior oc lii: 

 antenme with basal two joints subequal in length, third joint broad at bat 

 tapered from near base to apex, its entire length slightly 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 L-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 lore coxae bare, the portions of 

 thorax immediately above bases of lore coxae with long hairs; hairs in front of 

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

 posterior margin (21 30). Abdomen with dense erect stout hairs on entire 

 surface except on the hypopygium; hypopygium large, upper pr< long, 



directed cephalad over dorsum, as shown in PI. 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 thai with dense microscopic pile; all tibiae with short 

 hairs on dorsal surfaces and dense erect microscopic pile <»n ventral surfaces; 



