* Diptera 45 c 
one I have identified I have a slight 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 tibiae; eyes contiguous or sub- 
contiguous: sixth vein not extending to wing margin; hairs on thorax and abdomen fine 3 
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 joints of all tarsi with 
rather dense, long, fine hairs dorsally uvsina, 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 similala, 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 squamulae along the postero-ventral margins^ basal 
jomt of hind tarsi at least as thick as apices of tibiae; sixth vein extending to margin 
of whig herschcUi, n. sp. 
Femora devoid of squamuUc, at most with hairs or bristles; sixth vein not extending to 
margin of wing 3 
3. Tibiae and tarsi with dense short hairs of uniform strength, which nowhere exceed in 
' length the diameter of the part upon which they are situated wsina, n. sp. 
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 unequalin length 
similala, 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 coxte bare; hairs on thorax and abdomen black 
conservativa, n. sp. 
Rhamphomyia erinacioides, n. sp. 
Male. Black, subopaque. Wings slightly 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 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 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 coxae bare, the portions of 
thorax immediately above base's of fore coxae 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 hypopj^gium; hypopygium large, upper processes 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 ])asal third, beyond that with dense microscopic pile; all tibiae with short 
hairs on dorsal surfaces and dense erect microscopic pile on ventral surfaces; 
