Vol. XLV. LONDON, JULY, 1913 No. 7 



REPORT ON A COLLECTION OF JAPANESE CRANE- 

 FLIES (TIPULID.^), WITH A KEY TO THE 

 SPECIES OF PTYCHOPTERA. • 



BY CHARLES P. ALEXANDER, ITHACA, N.Y.* 



An extensive collection of Japanese crane-flies, taken by Dr. 

 S. I. Kuwana and assistant entomologists in the vicinity of Nishiga- 

 hara, Tokio, Japan, during tlie season of 1912, was forwarded to me 

 for examination. The material, alcoholic, is contained in 62 vials, 

 very carefully prepared and with complete data. I express my 

 sincere thanks to Dr. Kuwana and his assistants for this fine rep- 

 resentation of Japanese Tipulida? and Ptychopteridte. 



Family Ptychopferidce 

 Genus Ptychoptera Meigen. 



Key to the species of Ptychoptera. 



1 . Wings with a distinct brown cross-band along the cord 2 



Wings hyaline or subhyalinc without a distinct brown cross- 

 band along the cord . 



2. Radial sector more than twice as long as the radio-median 



cross-vein. (Europe) contaminata L. 



Radial sector rarely longer than the radio-median cross-vein. . . 3 



3 . Posterior metatarsus conspicuously white. 



(Europe). albimana Fabr. 



Posterior metatarsus not white. 



4. Pleura^ reddish yellow; a short brown cross-band near the mid- 



dle of the radial cell. (East. U.S.) rujocincta OS. 



Pleura? black; no brown cross-band near the middle of the 

 radial cell 5 



5. All coxae yellow or reddish-yellow; scape of antennae brownish- 



yellow or yellow 6 



* Contribution from the Entomological Laboratory of Cornell University. 



