1921] NATURAL SCIENCES OF PHILADELPHIA. 99 



yellow; femora brownish yellow, a little darkened apically; tibiae 

 light brown, the tips narrowly darkened; tarsi brown. Wings with 

 a strong yellowish gray tinge, darkest in the cells beyond the cord; 

 cells C, Sc and the wing-base more saturated yellow; stigma sub- 

 circular, brown; veins brown. Venation: Sco extending to about 

 opposite two-thirds Rs, the latter short, almost straight, feebly 

 angulated near one-fourth its length; R2+3 a Uttle shorter than Rs; 

 Ri short, straight, at a strong angle (65°) to R^+z', r practically 

 eliminated by atrophy; R3 very long, nearly three times 7^2+3; cell 

 1st M2 rather small, pentagonal; petiole of cell Mi about two-fifths 

 cell Ml, nearly three times m; m-cu barely evident. An obliterative 

 streak before the stigma, extending across the base of cell 1st Mi, 

 from Ri into the base of M4. Abdominal tergites brownish yellow, 

 the dorso-median area broadly, the lateral margins very narrowly, 

 darker ; sternites yellow. Ovipositor moderately elongate, very much 

 smaller than the preceding segments; tergal valves stout, compressed, 

 slightly narrowed before the obtusely rounded tips; sternal valves 

 flattened, the tips obliquely truncated. 



Habitat. — Peru. 



Holotype, 9 , Napo River, June 15, 1920 (H. S. Parish). 



Based on the structure of the female, the present insect must 

 be considered as being a race of armatipennis Alexander (Chapada, 

 Brazil) but the discovery of the male might result in giving the 

 form full specific rank. In typical armatipennis the flagellar seg- 

 ments are a little longer, there is no dark line on the vertex, the 

 thoracic coloration is more fulvous and the structm'e of the ovi- 

 positor is slightly different. 



Tipula bezziana sp. n. 



Frontal prolongation of the head very short, stout, nasus lacking; 

 head yellow, the inner margins of the eyes broadly margined with 

 black; mesonotum obscure brownish yellow, the praescutum with a 

 broad black median stripe; wings hyaline, cells C, Sc and the stigma 

 dark brown; wing-tip darkened; Rs short, strongly arcuated; cell 

 1st Mi large, subquadrate; fusion of Cui and M3 extensive; abdomen 

 of female elongate. 



Female. — Length 15-18 mm.; wing 10.2-10.3 mm. 



Frontal prolongation of the head very short, entirely without a 

 nasus, yellow, more brownish dorsally and here provided with con- 

 spicuous black bristles; palpi brown. Antennae short, scapal seg- 

 ments yellowish testaceous; flagellar segments dark brown with 

 long verticils. Head yellow, the vertex adjoining the inner margins 

 of the eyes broadly black, restricting the ground-color to a com- 

 paratively narrow median stripe on the vertex, broadening on the 

 occiput.. Pronotum yellow. Mesonotal praescutum obscure brown- 

 ish yellow with a broad dark brown median stripe, the lateral stripes 

 indistinct; pseudosutural foveae distinct; scutal lobes brownish 



