ABT. 28 REVISION OF DISONYCHA NORTH OF MEXICO — BLAKE 31 



with the locality label " N. Sonora, Mexico, Morrison ", from the Bio- 

 logia material, has been identified, presumably by Jacoby, as glahrata. 

 This species of Disonycha is one of the most widespread over the 

 United States, being found in the east from Maine to Texas and 

 westward to Arizona. It also occurs in Canada. It is distinguished 

 by the oblong shape, the rather closely punctate pronotum and elytra, 

 the two somewhat distant pronotal spots, the short, robust antennae, 

 and pale undersurface. In size and punctation it is somewhat vari- 

 able. Casey's Arizona specimens differ from Schaeffer's eastern 

 specimens {davisi) very little except in degree of coloration and 

 elytral punctation, the Arizona ones being paler and not so deeply 

 punctate and therefore with smoother and more shining elytra. The 

 undersurface of Casey's specimens is also less pubescent (the more 

 sparsely punctate ventral surface is Schaeffer's chief distinction be- 

 tween davisi and arizonae) . I can find no difference in the aedeagi in 

 specimens from Massachusetts, Tennessee, Texas, and Arizona. As a 

 rule, the northern specimens are larger, of darker coloring, and more 

 heavily punctate. A series from Tennessee and some from Texas 

 are small with the elytra densely but not deeply punctate. Another 

 series from Batchawana Bay, Lake Superior, Ontario, comprising 

 the largest of the specimens, is so coarsely punctate as to be confused 

 with functigera; in fact, this species is confused with 'punctigera in 

 the series of the LeConte collection under punctigera (see notes 

 under that species). It differs from jnmctigera in the shape of the 

 aedeagus and in having the submarginal and sutural vittae united at 

 the apex. This Lake Superior series is the most divergent of all 

 ihe specimens examined and deserves a varietal name. 



DISONYCHA ARIZONAE BOREALIS, new variety 

 Plate 3, Figure 14 



Descnption. — Of same shape and coloring as arizonae but with 

 much coarser and deeper pronotal and elytral punctation; fourth 

 antennal joint distinctly longer than third or fifth; aedeagus (see 

 pi. 3, fig. 14) of same general shape as in arizonae^ but with minor 

 differences. Length, 5.5 to 6.8 mm ; width, 3 to 3.5 mm. 



Tyye. — Male and 7 paratypes (5 female, 2 male), U.S.N.M. No. 

 43650. 



Type locality. — Batchawana Bay, Lake Superior, Ontario, col- 

 lected by H. G. Hubbard and E. A. Schwarz. 



Other locality. — Marquette, Mich. 



The type series was listed by Hubbard and Schwarz (Proc. Amer. 

 Philos. Soc, vol. 17, p. 640, 1878), from Bachewauung Bay (spelling 

 recently changed on maps) and IVIarquette under the specific name 

 punctigera as determined by LeConte. 



