New Species of Crane-Flies from the 

 United States and Canada 



(Tipulidie, Diptera). 



By Charles P. Alexander, State Natural History Survey, Urbana, Illinois. 



Most of the new species described in the present paper were found among material 



sent to the writer for identification. I am greatly indebted to Mr. W. L. McAfee and 



to Mr. F. R. Cole for the privilege of studying and describing many of the species 



included in this paper. Two interesting forms were collected in southern Illinois 



during the season of 1919 by Mr. Malloch and the writer. 



Family Tipulidae. 



Subfamily LimnobiinsE. 



Genus Dicranomyia Stephens. 

 Dicranomyia terrie-nov,e sp. n. 



General coloration gray, the praescutum with three dark brown stripes; antennse 

 dark brown throughout, the flagellar segments short-oval; wings with a heavy dark 

 brown pattern, including five large costal blotches; Sc short, basal deflection of Cul 

 far before the fork of M. 



Male. — Length about 5.5 mm.; wing, 7.6 mm. 

 Female. — Length about 7.5 mm.; wing, 7.7 mm. 



Rostrum dark brown; palpi brownish black. Antennae dark brown, the flagellar 

 segments short-oval, clothed with an abundant pale pubescence. Head bright silvery 

 on the front, duller on the posterior parts of the head; a conspicuous brown line on 

 the vertex. 



Pronotum dark brown. Mesothorax very deep, the mesonotum gibbous. Mesonotal 

 prasscutum light gray with three conspicuous dark brown stripes, the broad median 

 stripe indistinctly split by a capillary line; scutum gray with the lobes dark brown; 

 scutellum and postnotum gray, the latter with a delicate brown median line. Pleura 

 light gray with an indistinct brownish longitudinal stripe extending backward from 

 the fore coxae; a similar line on the mesosternum. Halteres yellow, the knobs dark 

 brown. Legs with the coxae small, gray; trochanters dull yellow; femora brownish 

 yellow, the tips indistinctly darker; tibiae and tarsi brown. Wings whitish subhyaline 

 with a heavy brown and grayish pattern, as follows: five dark brown blotches along 

 the costal margin, the first near the wing-base, the third at the tip of Sc and the origin 

 of Rs, the fourth at the tip of Rl , the last at the tip of R2-\-3, suffusing the wing-apex; 

 the first three of these markings reach the costa and pass into cell R; the fourth 

 (stigmal) is rectangular, connected with a blotch at the fork of Rs ; narrow brown 

 seams along the cord and the outer end of cell 1st M2 ; large brownish gray clouds 

 along the margin at the ends of the veins and at the anal angle of the wings. 

 Venation: Sc short, ending just beyond the origin of Rs, Sc2 indistinct, apparently 

 somewhat removed from the tip of Scl, this distance about equal to the basal deflec- 



