CHARLES P. ALEXANDER 25 
closely related; the tliree basal antennal segments light yellow; the following 
two with the enlarged basal quarter black, the remainder brownish yellow; 
remaining antennal segments almost uniformly dark brown with an abundant 
silvery pubescence. Frontal tubercle distinct; head dull gray with a narrow, 
indistinct brown median vitta; occiput tinged with I'eddish yellow. 
Thoracic dorsum almost uniformly dull gray excepting the narrow dark 
brown median vitta which is distinct on the praescutum, broadened on the 
postnotum; scutellum paler on the sides. Pleura mostly dark gray, the in- 
tegument more brown. Halteres long, slender, with the knob brown, the 
stem dull yellow. Legs with the coxae light yellowish brown; trochanters 
and femora light brown, the latter dark brown at the tip; tibiae light brown, 
the tip dark brown; tarsi light brown, the apical segments dark brown. Wings 
with the costal cell yellowish, remainder of the wings variegated with whitish, 
brown and gray; the white area beyond the stigma includes most of the wing- 
apex, the tips of cells i?2 and R3 and smaller areas in cells Rr, and the outer 
medial cells being grayish ; the stigmal area is brown ; gray clouds at the origin 
of Rs, at mid-length of cell R, and in most of the basal cells. Venation: (see 
plate III, fig. 1) the tip of R2 indistinct, very pale. 
Abdominal tergites 1 to 5 dull yellow, 6 to 8 dark brown, the ninth medium 
brown; an indistinct brown lateral stripe; sternites dull yellow, the terminal 
segments dark gray. Hypopygium quite similar to that of T. jivaro, the eighth 
tergite broad, conspicuous, the caudal margin straight across or even slightly 
convex medially; ninth tergite (see plate V, fig. 2) broadly subquadrate, with 
a deep median furrow as in jivaro, the caudal margin produced into a median 
lobe whose outer angles are chitinized teeth. Ninth pleurite about as in 
jivaro, the caudal prolongation (a) reduced to a tiny lobe which is scarcely 
visible; the more chitinized lobe (b) which arises from the ventral portion of 
the sclerite is a little smaller; the pleural appendages are similar to those of 
jivaro. The tripartite appendage to the eighth sternite is as shown in the figure 
(see plate V, fig. 5), the lateral lobes being elongated, only a little shorter than 
the median lobe. 
The female is similar to the male, the antennae a httle shorter, with the 
dorso-median thoracic vitta running the whole length of the sclerite; abdomen 
greatly elongated, slender, tergal valves of the ovipositor short and high, the 
sternal valves still shorter, very high. 
Habitat. — Peru. Holot3^pe,d^, San Cristobal Hill, Lima, Peru, 
altitude 1000 feet, September 26, 1912 (C. H. T. Townsend coll.). 
Allotype, 9 , topotypic. Paratypes, 2 cf , 4 9 , topotypic. 
Tipula jivaro sp. n. 
Monilifera group; antennae short, bicolorous; thorax gray with brown 
stripes and numerous brown spots on the interspaces of the praescutum; 
wings marbled with subhyaUne, gray and brown. 
Male. — Length, 18 mm.; wing, 18 mm.; antennae about 5. .5 mm. 
Female. — Length, 22 mm.; wing, 16.4 mm.; abdomen, 16.1 mm. 
TRANS. AM. ENT. SOC, XLII. 
