ABT. 28 REVISION OF DISONYCHA NORTH OF MEXICO BLAKE 25 



with sutiiral, median, and submarginal vittae, metasternura in 

 part, apex of tibiae, and tarsi dark. Head with interocular space 

 more than half width of head ; carina not acute, broad and produced ; 

 frontal tubercles somewhat swollen ; coarsely and rugosely punctate 

 on each side of front, with middle a little smoother ; pale, the labrum, 

 often tubercles, and occiput darkened. Antennae, stout, dark with 

 paler basal joints, third joint shorter than fourth or fifth, which are 

 subequal with the fourth slightly longer. Prothorax not twice as 

 wide as long, somewhat convex, a callosity on either side and slight 

 median basal depression; narrowed anteriorly with arcuate sides; 

 surface alutaceous, moderately coarsely and rather densely punctate ; 

 pale with two well-marked anterior spots, the lateral spots and 

 median stripe faint. Scutellum dark. Elytra oblong oval with 

 parallel sides; somewhat convex; humeri well marked with a short 

 intrahumeral sulcus; surface alutaceous, feebly shining, distinctly 

 and densely, often confluently punctate; pale with narrow sutural, 

 median and submarginal vittae, the sutural and submarginal weakly 

 joined. Body beneath densely pubescent, pale with metasternum in 

 part, apex of tibiae, and tarsi dark. Length, 7 to 8 mm; width, 3.6 

 to 4.2 mm. 



Type. — Male and two female paratypes, U.S.N.M. No. 43649. 



Type locality. — " Canada " (Wirt Robinson collection.) 



Distribution. — "Canada"; Ohio (Cincinnati). 



Food plant. — Unknown. 



Remarks. — This species is related to alternata but easily distin- 

 guished from it by the coarse and dense punctation of the elytra. 

 The aedeagus also differs from that of the rest of the alternata 

 group, although bearing a resemblance to that of alternata. I take 

 pleasure in dedicating this species to Charles Schaeffer, who has 

 studied the genus Disonycha for manj'^ years. Mr. Schaeffer has sent 

 me for examination from his collection two specimens of this species, 

 both females, with the locality label Cincinnati, Ohio. 



9. DISONYCHA PLURILIGATA (LeConte) 



Plate 2, Figure 9 



fAltica quinqnevittata Say, Journ. Acad. Nat. Sci. Philadelphia, vol. 4, p. 88, 

 1824 ("Missouri"; type lost). 



Halfica pluriUgata LeConte, Proc. Acad. Nat. Sci. Philadelphia, vol. 4, p. 27, 

 1858 (Kansas and Texas; type in LeConte collection, Mus. Comp. Zool.). 



Disonycha pluriUgata LeConte, Smithsonian Contr. Knowl., vol. 11, p. 25, 1859. 



Disonycha qninqucvittata Horn, Trans. Amer. Ent. Soc., vol. 16, p. 203, 1889 

 (in part).— Jacoby, Biol. Centr. Amer., vol. 6, suppl., p. 276, 1891.— Schaef- 

 fer, .Touru. New York Ent. Soc, vol. 39, p. 279, 1931. 



Description. — Elongate oblong oval, somewhat shining ; pale, head 

 with occiput, labrum, and often tubercles darker, pronotum usually 

 5-spotted, lateral spots sometimes evanescent, elytra with sutural, 



175870—33 4 



