CHARLES P. ALEXANDER 25 



closely related; the thi-ee basal antennal segments light yellow; the following 

 two with the enlarged basal quarter black, the remainder brownish yellow; 

 remaining antennal segments almost uniformly dark bro-mi with an abundant 

 silvery pubescence. Frontal tubercle distinct; head dull gray with a narrow, 

 indistinct brown median vitta; occiput tinged with reddish yellow. 



Thoracic dorsiun almost uniformly dull gray excepting the narrow dark 

 broTATi 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 wdth the coxae hght yellowish browii; trochanters 

 and femora hght brown, the latter dark brown at the tip; tibiae hght bro\\'n, 

 the tip dark brown; tarsi hght brown, the apical segments dark bro^\'n. Wings 

 with the costal cell yellowish, remainder of the wings variegated with w'hitish, 

 brown and gray; the white area beyond the stigma includes most of the wing- 

 apex, the tips of cells R2 and R3 and smaller areas in cells Ro and the outer 

 medial cells being grayish; the stigmal area is bro^n; 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 showii in the figure 

 (see plate V, fig. 5), the lateral lobes being elongated, only a httle 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 ovii)Ositor short and high, the 

 sternal valves still shorter, very high. 



Habitat. — Peru. Holotype,cf , San Cristobal Hill, Lima, Peru, 

 altitude 1000 feet, September 26, 1912 (C. H. T. Townsencl coll.). 

 Allotype, 9 , topotypic. Paratypes, 2 cf , 4 9 , topotj^pic. 



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 subhyahne, 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. EXT. SOC, XLII. 



