H. C. FALL 447 



127. Pachybrachys liebecki new species 



Pale yellowish testaceous, elytra with slight greenish tint; 

 prothorax with very diffuse reddish brown clouds, frontal mark- 

 ings not large, reddish brown; surface finely alutaceous, scarcely 

 shining. Ave. length 3.75 mm. Kansas. 



Head moderately punctate, ocular lines distinct; eyes rather small, not 

 prominent, separated in the male by a little less, and in the female by a little 

 more than their own vertical lengths, or by about two and one-half or two and 

 three-fourths times the length of the basal antcnnal joint in the male and about 

 four times the length of the basal joint in the female. Antennae short, scarcely 

 exceeding half the length of the body in the male, and distinctly shorter in the 

 female, the subapical joints twice as long as wide, color rufous, basal joints 

 darker above, beyond the middle entirely blackish. 



Prothorax transverse trapezoidal, the sides nearly straight, verj^ broadly 

 obtusely subangulate just before the base; punctuation not very dense, nearly 

 evenly distributed, side mai'gins smoother but not abruptly so. 



Elytra much wider than the prothorax, punctuation fine, striae seven and 

 eight and usually one and two or two and three fairly regular but unimpressed, 

 the [junctures of the intermediate area and in the scutellar region confused; 

 submarginal interspace convex and prominent, marginal interspace flat and 

 impunctate except near the base; elytral shield wanting, lobe without marginal 

 row of punctures. 



Pygidium entirely pale. Body beneath pale, the metasternum black at 

 middle. Legs flavo- or rufo-testaceous, thighs with or without sKghtly darker 

 diffuse median clouds. Front claws of male not enlarged. 



Length 3.5 to 4 mm.; width 1.8 to 2.15 mm. 



Distribution. — Kansas. The type is a male from "Ks" given me by Mr. 

 Liebeck, to whom it is a pleasure to dedicate the species. Other examples 

 before me are from Hamilton Co. and Clark Co. (Snow) ; Medora, May (Knaus). 

 The size, color, and convex submarginal (eighth) interspace 

 make this species easily recognizable. The general facies strongly 

 suggests the paler forms of the bivittatus group, with which it 

 seems best to associate it, but it should be remarked that in all 

 the other species of this group the ocular lines are indistinct or 

 wanting, the elytra as a rule vittate, and the elytral lobe shows the 

 usual marginal series of punctures. 



12S. Pachybrachys bivittatus Say 



Yellow, prothoracic disk usually broadly suffused with rufous, 

 elytra each with a median black or broAvn vitta and three lateral 

 spots one or more of which may be lacking. Eyes in the male 

 separated by less than twice the length of the basal joint of the 

 antennae, ocular lines subcontiguous to the eyes, front claAvs of 



TRANS. AM. ENT. SOC, XLI. 



