THE CANADIAN ENTOMOLOGIST 111 



paler on the sides, with a narrow, blackish median vitta; postnotum orange- 

 yellow, the median area brownish, broader on the posterior portion Pleura 

 yellow, indistinctly spotted with reddish brown; a narrow, almost black line 

 immediately before the base of the halteres. Legs with the coxa? dull yellow, 

 indistinctly brown at the base; trochanters dull yellow; femora dull brownish 

 yellow, the tips darker; tibiae brown, the tips narrowly dark brown; tarsi dark 

 brown. Wings with a faint yellowish tinge, the costal area but little brighter; 

 stigma dark brown; a narrow brown seam along the cord, passing along both 

 branches of Cu to the wing-margin; tip of the wing narrowly darkened; a pale 

 vitreous area in cell 1st R^ before the stigma. Venation : cell M^ broadly sessile; 

 m-cii present, located just before the fork of M. 



Abdominal tergites obscure yellow; segment one with a black basal ring; 

 other segments with the caudal margin blackened, this broadest on segments 

 two to four, more or less produced cephalad medially so as to be almost con- 

 tinuous along the dorso-median line; the black caudal margin is narrow and 

 less distinct on the succeeding segments; lateral margins of the segments broadly 

 dark brown; sternites yellow. Ovipositor with the tergal valves very long and 

 slender, acute, greatly exceeding the sternal valves. 



Habitat. — Illinois. 



Holotype — ^9 , Antioch, Lake Co., June 5, 1919, (T. H. Prison). 



Paratopotype— 9 • 



Type in the collection of the Illinois Natural History Survey. 



This species was submitted to Dr. Dietz for his expert opinion and he 

 agrees that the fly is undescribed, most closely related to TV. incurva (Lw.), 

 from which it may be told by the diagnostic characters given above. The types 

 were secured by Mr. Prison in a sphagnum bog, associated with other species 

 of Tipulidse of northern affinities {Limnophila poetica O.S., Tipula serta Lw., 

 Tipula senega Alex., and others). 

 Tipula claasseni, new species. 



Head and thorax brownish black; wings grayish subhyaline, the base and 

 subcostal cell yellowish; abdominal tergites orange-yellow, trivittate with dark 

 brown ; ovipositor with the valves short and fleshy. 



Female. — Length 11.8-12 mm.; wing 13-14 mm. 



Prontal prolongation of the head rather short, narrowly dark brown above, 

 obscure yellowish on the sides; nasus distinct. Antenna? short, dark brown, 

 the second scapal segment a little paler. Head dark brownish black, paler 

 on the sides of the vertex and on the postgenae. 



Thorax, in alcohol, dark brownish black, in dry specimens possibly prui- 

 nose, the dorso-pleural membranes obscure yellow. Halteres light brown. 

 Legs with the coxse and trochanters brownish black; femora reddish, narrowly 

 tipped with dark brown; tibiae brown, the tips slightly darker; tarsi brownish 

 black. Wings grayish subhyaline, the base strongly yellow; cells C and, espe- 

 cially, Sc, light yellow; stigma small, brown; a conspicuous obliterative area 

 before the stigma in cell 1st R^ and another in the end of cell R that crosses 

 vein Jlfi+2 and almost fills cell 1st M^. \'enation: Rs long, longer than i?^ but 

 shorter than R\- i?2+3 a little longer than r-m; deflection of R'^^^ short or practically 

 obliterated, the r-m cross-vein correspondingly lengthened; cell 1st M^ small, 

 pentagonal; petiole of cell M^ a little longer than m; m-cu short. 



