INSDCUTOR INSCITI^ MENSTRUUS 139 
Allotype, female, topotypic. 
Paratype, female, topotypic. 
This insect bears a remarkable superficial resemblance to Tipula 
sayi Alex., but the subunicolorous antenna, the obliteration of 
the lateral prascutal stripes, and the very different structure 
of the hypopygium of both male and female offer abundant 
points of difference. 
The type and paratype are in the collection of the United 
States National Museum, Cat. No. 19986 ; the allotype is in the 
collection of the author. 
Tipula megalabiata, new species. 
Male. — Length, 11 mm.; wing, 13.5 mm. 
Palpi pale brown. Frontal prolongation of the head brown- 
ish yellow with a very sparse grayish bloom toward the base ; 
nasus distinct. Antennae pale yellow, the first flagellar seg- 
ment a little darker; remaining segments dark brown at the 
base, dull yellow beyond, the apical segments more brownish. 
Head light gray, the front more whitish. 
Thoracic dorsum light brown with the prsescutal stripes dull 
gray, not clear-cut; the scutellum slightly brownish on the 
sides. Pleura light yellow with a sparse whitish bloom. Hal- 
teres light brown, the knobs darkened. Legs with the coxse 
yellow with a sparse whitish bloom; trochanters light yellow; 
remainder of the legs broken. Wings with a gray tinge, dark- 
est at the apex ; costal area light brown ; a large brown stigmal 
spot ; smaller brown spots at the base of Rs and the tip of 5c ; a 
broad vitreous band before the cord, extending from before 
the stigma into the base of cell M^ ; no vitreous spot beyond 
the stigma. 
Abdomen with the tergites rather bright yellow, the terminal 
segments more brownish yellow; a broad dark brown dorsal 
line, narrowest anteriorly, broadened out on the posterior seg- 
ments; tergites narrowly ringed caudally with silvery; seg- 
ments 2 to 5 with a large rounded dark brown spot on each 
side, on the last three segments basal in position, on the second 
segment at about midlength; first sternite dark brown; re- 
