56 Annals Entomological Society of America [Vol <V, 
Tipula sternata n. sp. 
Yellow; head yellow slightly darker above; palpi brown, yellow at 
the base; first two segments of antennee yellow, third brownish yellow, 
others brown; dorsum of thorax yellow with three brown stripes faintly 
indicated; scutellum, metanotum and pleura yellowish; halteres brown, 
base yellow, knobs brown, tips lighter; legs yellow, the tarsi and the 
extreme tip of the femora and tibia a little darker; abdomen yellow at 
the base, brownish yellow posteriorly, the three brown stripes only 
faintly indicated; eighth sternite extending well up on the sides of the 
abdomen and much produced posteriorly, posterior margin rounded, 
upper (inner) surface with a median pair of short brush-like tufts of 
hair and a lateral pair of large whitish, membranous appendages 
which end in strongly chitinized brown triangular tips; ninth tergite 
very large about as broad as long, posterior lateral angle produced into 
a pair of thick heavy, slightly curved pointed horns; posterior margin 
with two broad, flattened, black-edged teeth between which is a small 
rounded incision; ninth sternite about concealed by the eighth sternite, 
only the sides showing; posterior margin with a double incision the 
heart-shaped anterior part being connected with the rounded posterior 
part by a narrow channel; in the middle of the heart-shaped part lies the 
two slender, curved, round-tipped processes which branch off from the 
base of the guard, the guard itself being long, shield-shaped and with 
seven black teeth or spines toward the tip, the largest and longest arises 
from the middle line of the posterior face not far from the tip; pleura 
very small, suture complete; first pair of appendages small, whitish, 
spatulate, tip with brown hairs; second pair flattened, posterior margin 
rounded, anterior margin more strongly chitinized, black, ending in a 
heavy triangular tooth with a much smaller spine just before it; third 
pair closely joined to the second forming a rounded lobe on its posterior 
margin; wings hyaline, costal and subcostal cells and stigma with yellow- 
ish brown tinge; veins brown. Length 17 mm., wing 18 mm. 
Habitat: Stanford University, Cal. 2 males: 
Tipula tergata n. sp. 
Brown; head yellowish, somewhat cinereous above; palpi yellow, 
last segment brown; first two segments of antennze yellow, the third 
yellowish, brownish toward the tip, other segments brown, slightly 
swollen at the base; dorsum of thorax light yellowish brown with four 
distinct brown stripes; scutellum and metanotum light brown with a 
median darker line; pleura grayish, pruinose; halteres yellow, knobs 
brown, tips lighter; legs brown, coxee and basal portion of femora yellow; 
first two or three segments of abdomen yellowish, others brownish, 
posterior margin of each light yellow; eighth sternite very large, the 
broad posterior margin with a very slight rounded incision, the narrow, 
whitish membrane at the middle provided with two tufts of reddish 
vellow hair; lateral angles with irregular-shaped appendages, ending in 
an upper blunt and a lower sharper lobe, the posterior faces strongly 
chitinized; ninth tergite large, about as broad as long, posterior latera 
