Dec. 1896 J LlNELL: On NoRTH AMERICAN ChRVSOMELAS. 195 



ing the ends of the segments, on 3 to 7, sometimes on base of 8 ; membrane at base of 

 9 and 10 yellow ; sides of i yellow, and of 2, except behind the ears and on posterior 

 margin ; yellow on base of 3 ; sometimes on 4 to 7 a basal spot, and sometimes an 

 apical one on 7 ; sides of 8 mostly yellow, with a projection above ; border of 9 yellow, 

 and lower apical portion of 10; 10 about one-half as long as 9 ; appendages black; 

 superior pair longer than 10, divaricate, acute at tip, at half their length on inner side 

 below is a large sharp pointed tooth ; inferior pair but little shorter, and with the 

 branches more widely divaricate, than the superior pair, upturned at tip. In the 9 , 

 the dorsal stripe on i and 2 is much broader and the sides of i and 2 wholly yellow ; 

 on the sides of 3 to 7 is a long yellowish mark with its tip turned down, on most of 

 the segments the basal portion of this mark is separated from the rest ; sides of 8 yel- 

 low, with projections upward ; sides of 9 and 10 yellow, and a narrow median stripe 

 above on 10; superior appendages black, rest yellowish; vulvar lamina black, one- 

 third as long as 9, apical half bifid and divaricate, the tips acute. 



Described from six males and two females, collected at Ithaca, N. Y., 

 and sent me by Mr. MacGillivray ; May 21, 1890; May 15, 1894; 

 May 18, 1895. 



A SHORT REVIEW OF THE CHRYSOMELAS OF 

 NORTH AMERICA. 



Bv Martin L. Linell. 



The following attempt at a synopsis of the species entered in our 

 check-list under the generic names of Doryphora and Chrysomela, is 

 based principally upon the material in the U. S. National Museum, but 

 I am also greatly indebted to Messrs. Schwarz and Hubbard and Mr. 

 H. Ulke for access to their extensive collections as well as for valuable 

 information. 



The genera may be separated as follows : 



Last joint of palpi short, truncate. 



Mesosternum prominent, tuberculiform between the coxce. Anterior femora of 



male strongly toothed Labidomera Chevrolat. 



Mesosternum not surpassing the level of prosternum. Femora simple. 



Leptinotarsa Stal. 

 Last joint of palpi not shorter than penultimate. 



Claws parallel, connate at base ZygOgramma Chevrolat. 



Claws divergent. 



Sides of thorax not incrassate. Elytra with darker markings limited by 



impressed punctures Calligrapha Erichson. 



Sides of thorax incrassate. Elytra not maculate. . . .Chrysomela Lintii. 



Genus Labidomera Chevrolat. 

 Contains only L. clivicollis Kirby, and its variety L. rogersit 



