INSECUTOR INSCITI^ MENSTRUUS 13'9 



Allotype, female, topotypic. 



Paratype, female, topotypic. 

 This insect bears a remarkable superficial resemblance to Tipula 

 sayi Alex., but the subunicolorous antennas, the obliteration of 

 the lateral prsescutal 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 praescutal 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 coxae 

 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 5*^ ; 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- 



