80 PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



April 30-May 5. 1926 (Ren). From Yehzah, China, 1 male, April 

 28, 1926 (Ren). From Hangchow, China, 1 female, April 24, 1925 

 (Chao) ; 1 female. May 15, 1925 (Chao) ; 2 females, 1925; 1 male and 

 2 females, April 14. 1926 (Jaynes) ; 1 male, April 19, 1926 (Chao) ; 

 35 females, Ai)ril 15-May 13, 1926 (Chao) ; 1 female, April 29, 1926 

 (Jaynes), Exp. Nos. 204-3; 2 females, Exp. 120; 7 females. May 5-9, 

 1926 (Chao). From Zakow, China, 3 males and 37 females. No 

 labels, 5 males and 1 female. Representative specimens have been 

 deposited in the collections of the British Museum, the Illinois Nat- 

 ural History Survey, and the Philadelphia Academy of Natural 

 Sciences. In the collection of the United States National Museum, 3 

 females, Asakawa, Japan, June 15, 1920 (Clausen), Clausen No. 1380, 

 Rohwer No. 4 have been referred tp this species. 



Nearly all the material from Suigen, Chosen, and much of that 

 collected early in May, 1926, by Chao at Hangchow, China, is marked 

 by having grooves on the medio-dorsum of the impunctate apex of 

 the pronotum. by having directly above the antennal fossae a group 

 of 30 or more punctui'es which are much larger, more angular, and 

 closer together than the others, with linear interspaces, and by hav- 

 ing the bend in the first abscissa of the radius distinct and nearly or 

 quite equal to one-third the distance to the first intercubital vein, and 

 Avith the second intercubital vein strongly bent at the middle. 

 Nearly all the specimens from Zakow, China, and some from Hang- 

 chow, China, which were collected on the same dates as the above, 

 differ in being noticeably smaller, in lacking the median groove on 

 the pronotum, in having the punctures immediately above the an- 

 tennal fossae scarcely larger than others on the front, and with a 

 cluster of at most one dozen crowded and angulate punctures with 

 linear interspaces, in lacking the distinct bend of the first abscissa 

 of the radius, which, if present, is scarcely more than one-fourth 

 the distance to the first intercubital vein, and with the second inter- 

 cubital vein nearly straight. BetAveen the two extremes there are 

 specimens from a number of localities which show many degrees 

 of intergradation. For this reason, and because all available biologi- 

 cal data show no striking differences among the forms included here, 

 it has been decided to include all forms within the same species. 



In two males, one without a label and the other from Hangchow, 

 China, April 15, 1924 (Chao), the clypeal extension is more nearly 

 truncate, and is scarcely half as wide apically as the clypeoantennal 

 distance. The impression on the outside of the tegula does not end 

 as abruptly as in the specimens from Chosen, and the punctures of 

 the preocellar area are noticeably sparse. However, these specimens 

 should probably be considered as mere variations from the typical 

 vernalis. 



