312 MEMOIRS ON THE COLEOPTERA 



macula behind apical third, thence more broadly black to the tip; 

 there are also a few other scattered discal spots in posterior third and 

 a larger one on the subapical umbo, the humeral umbo not black; 

 pygidium nearly similar; middle femora similarly blackish. Length 

 (9) 12.3 mm.; width 7.0 mm. Kansas (Wallace), Knaus. 



wichitana n. sp. 



5 Elytra pale, maculate with black, always having the flanks largely 

 pale; pronotal black discal area solid 6 



Elytra black throughout 7 



Elytra black, the costae having small and widely separated nubilous pale 

 spots; body more elongate 8 



6 Anterior part of the black pronotal spot always abruptly narrowed 

 and with parallel sides. Body smaller and narrower than in kerni, 

 the elytra with much less black maculation; vestiture above short, 

 sparse and inconspicuous as usual; head black, shining, deeply and 

 densely punctate, the pubescence of the vertex coarse, yellowish; 

 sides of the clypeus not elevated, the broad apex feebly sinuate at 

 the middle, the angles, as usual, broadly rounded; prothorax rather 

 short, two-fifths wider than long, the sides and broadly rounded 

 basal angles as in the preceding; punctures close and strong, coarse 

 laterally, less coarse medially, the median line and a small callus 

 at each side of the centre subimpunctate; base feebly, subevenly 

 arcuate, narrowly, the sides broadly and with small black spot near 

 the median black area, pale; scutellum slender, pointed, expanded 

 at base, sculptured as usual, black, with a small pale spot behind the 

 middle; elytra of the usual form and sculpture, the suture, narrowly 

 expanded behind the scutellum into a large transverse spot extending 

 along the latter and a part of the base, black, the ridges also with 

 small black spots and some others are scattered laterally in apical 

 half, the humeral callus black; pygidium castaneous, with coarse 

 wavy incised lines, sparse in the female. Length (i cf , 3 9) 9.7- 

 10.8 mm.; width 5.7-6.0 mm. Texas and Arizona, .connivens n. sp. 



Anterior part of the solid black pronotal area always oblique, the black 

 spot at the sides very seldom isolated. Body somewhat variable in 

 size, moderately stout, slightly rhomboidal, feebly convex, moder- 

 ately shining, the elytra straw-yellow, with black spots and larger 

 areas, the surface with much more black than pallid coloration, in 

 which it differs from any of the foregoing species, in fact in the 

 blacker parts there are only small pale spots widely spaced along the 

 discal and sutural ridges, the humeral and subapical umbones and 

 two post-median submarginal spots are also black; head nearly as in 

 the preceding; prothorax subsimilar but notably less abbreviated, 

 generally a third wider than long, the punctures strong and close-set 

 to dense, with the median line and discal callous spots similar, the 

 erect hairs coarse, not very long; base feebly and evenly arcuate, 

 sometimes slightly truncate medially; scutellum barely longer than 

 the width of its expanded base, black, sometimes with an oval pale 

 spot subposteriorly ; elytra as usual, expanded at the humeri, 

 parallel and arcuate behind the deep sinus, the apical angles broadly 

 rounded from posterior third to the suture; sculpture as usual; 



