JULY, 1906. 
TWO SPECIES OF PHOBIDAE. 
101 
of the wing, its cilia short, dense and closely placed. First vein 
ending a trifle closer to the tip of the third than to the humeral 
cross-vein. Third vein close to the costa, the cell at its furcation 
very narrow. Fourth vein faintly curved at base and recurved at 
tip, fifth and sixth but little curved, seventh very distinct. Halteres 
pale. 
Described from one male specimen collected hovering about 
the burrows of Tremex columba in an old stump where Thalessa 
lunator and T. atrata were ovipositing. Milwaukee, Wisconsin, 
Jv:i 8, 1906. Type in the collection of the Milwaukee Public 
Museum. 
Since writing the above, I have received an exactly similar 
male sent for identification by Mr. E. S. Tucker of the University 
of Kansas. It is labeled, twilight, Lawrence, Kans., June. 
This is a very distinct species, easily recognized by its 
infuscated wings, long front and very spiny legs. The shape and 
peculiar chaetotaxy of the front are similar to A. epeirce Brues, but 
it is quite different in other characters, notably the non-thickened 
costal vein, and the presence of four scutellar bristles. 
APHIOCHiETA CAVERN I COLA Sp. nov. 
Male and Female. Length 2-2.5 mm. Black or piceous ; legs, 
antennae and palpi yellow. Head wide and short ; the front fully 
twice as wide as high, sub-shining. Four proclinate bristles 
present, very long and stout and more nearly porrect than is usual 
in this genus. Following two rows slightly curved downward ; 
ocellar row normal. Ocelli placed on a tubercle, the median 
frontal line present. Antennal cavity large and deep ; the antennae 
brownish-yellow, ovate, of moderate size; arista long, pubescent. 
Palpi large and rather slender, with the usual bristles ; proboscis 
retracted. Cheeks each with a row of stout macrochaetse along the 
lower eye-margin ; post-ocular cilia very long. Thoracic dorsum 
piceous, finely hairy and sub-shining, with no conspicuous bristles 
except a single pair of dorsocentral macrochaetae and a bristle on 
each side before the wing. Scutellum subtriangular, with only 
two marginal bristles. Abdomen long and narrow, black, sub- 
opaque, slightly shining in the female. Bare, except for a few 
short scattered hairs in the male. Male hypopygium small, the 
small lamella triangular and scarcely projecting. Legs long and 
slender ; testaceous yellow. Tibiae bare except for the slightest 
trace of ciliation on the posterior pair. Wings very large, tinged 
with brownish. Costal vein reaching a little beyond the middle of 
the wing, its cilia moderately long and rather thickly placed. First 
