130 INSECUTOIi INSCITI^ MENSTRUUS 



caudad; ninth pleurite and sternite largely concealed by the 

 prominent eighth sternite ; eighth sternite prominent, the dorsal 

 surface with a flesh lobe on each side near the apex, densely 

 white pubescent, bearing at the apex sharp, reddish spines. 



Holotype, male, Colorado. (From the collection of C. V. 

 Riley.) 



Type, Cat. No. 19980, U. S. Nat. Mus. 



Tipula pleuracicula, new species. 



Male. — Length, 11.3 mm. ; wing, 13 mm. 



The type is teneral and the colors are not deep. Palpi light 

 brown. Frontal prolongation of the head rather short, dull 

 yellow, the extreme base with a slight gray bloom; the nasus 

 prominent, upturned. Antennae dull yellow, the flagellar seg- 

 ments probably darkened at the base in fully-colored speci- 

 mens. Head light gray with a delicate interrupted median line. 



Thoracic dorsum dull yellow without distinct darker stripes. 

 Pleura with a sparse grayish bloom. Halteres long, slender, 

 light brown, the base more yellowish. Legs with the coxae and 

 trochanters dull yellow ; femora yellowish brown ; tibiae and 

 tarsi brown. Wings subhyaline; costal region and the stigma 

 darker ; veins brown. 



Abdom.en brownish yellow, the segments narrowly ringed 

 with silvery around the caudal margin. Ninth tergite of the 

 hypopygium broad, conspicuous, the caudal margin subtrans- 

 verse, the sublateral angles prominent, short, directed caudad 

 and strongly ventrad, the apices truncated and sparsely 

 toothed; ninth pleurite small, complete, produced caudad as a 

 long needle-like point ; eighth sternite prominent, the caudal 

 margin almost straight across and with a broad fringe of 

 coarse golden hairs. 



Holotype, male, Colorado. (From the collection of C. V. 

 Riley.) 



Type, Cat. No. 19981, U. S. Nat. Mus. 



Tipula stalagmites, new species. 



Male. — Length, 14 mm. ; wing, 15.5 mm. 



Palpi with the first segment dull yellow ; the second segment 



