14 
A male in the collection of the Illinois State Natural History Survey, 
collected at Las Vegas, N. M., and one from the collection of N. Banks, 
collected by A. Agassiz in the Gulf of Georgia, B. C., differ from the 
typical form in having only the tubercles on segment 5 tooth-like, the 
others being poorly developed—otherwise I can detect no specific dis- 
tinctions, and I refer the specimens to this species tentatively. 
TIPHIA TUBERCULATA, SP. Nn. 
Male—Glossy black. Antennal flagellum opaque black, usually 
paler below, occasionally yellowish brown towards apex on that side; 
palpi yellowish; mandibles pale from middle to tip. Legs black, anterior 
or inner side of fore tibiae, apices of mid tibiae, and the whole or a 
great part of all tarsi ferruginous or yellowish, tibial spurs pale. Wings 
clear at base, becoming brownish beyond middle and especially in the 
marginal cell; stigma and veins brownish black. 
Punctures on lower portion of face of moderate size, contiguous, 
becoming more widely spaced above, ocellar region in small individuals 
sparsely punctate, no impunctate preocellar line present; scape of an- 
tennae closely punctate, the punctures small; clypeus flat, generally 
rounded or slightly transverse anteriorly in center, never emarginate, 
doubly punctate at base, the punctures large at apex and usually ex- 
tending to extreme margin; mandibles without a well-developed pre- 
apical inner tooth; cheek minutely and closely doubly punctate. Pro- 
notum with sparse, regular, moderately large punctures on disc; meta- 
thoracic enclosure well defined, never with a complete central ridge, 
the enclosed surface usually shagreened or faintly rugose; mesopleura 
with small punctures which are well separated, and between them many 
very minute punctures. Basal abdominal segment without median trans- 
verse incision; preapical depression broad and shallow, usually with 
1-2, rarely 3, series of small punctures; second segment with very small 
widely separated punctures, remaining segments with closer and larger 
punctures, especially basally and apically; apical segment with a very 
narrow, faintly shagreened, impunctate central longitudinal line on apical 
half; fifth ventral abdominal segment with a distinct tooth-like pro- 
jection, or a slightly elevated ridge, on each side near apex. Marginal 
cell very distinctly surpassing apex of second submarginal, its apex 
usually rounded; base of first cubital in nearly all cases distinct but 
short. 
Female —Differs from the male in having the fore tibiae entirely 
black, and the tarsi usually less noticeably yellowish. 
The clypeus is regularly broadly rounded or subtruncate centrally 
at apex and punctured except on a narrow apical margin; the face is 
closely and minutely doubly punctate below, becoming more coarsely 
and gradually more widely punctate above; cheeks doubly punctate on 
posterior half; mandibles simple. Mesopleura with rather small, widely 
separated punctures, the spaces between microscopically shagreened and 
