394 AMERICAN PACHYBRACHYS (cOLEOPTERa) 



interspace otherwise impunctate or virtually so; shield small, generally indis- 

 tinct. 



Pygidium blackish and yellow, t\'])ically marked. Body beneath blackish, 

 last segment of abdomen apically i)ale. Legs yellow, with small femoral and 

 tibial spots or shades brownish. 



Length 2.75 to 3.4 mm.; width 1.5 to 1.8 mm. 



Distribution. — Texas: (Belfrage) type; in addition to the type I have seen 

 some seven or eight examples labeled simply "Tex." in the LeConte, Horn, 

 Nat. Museum and Leng Collections, most if not all of which were probably 

 from the same source. Colorado: (Leng Coll.). Montana: (Leng Coll.). 



The general appearance of this species is altogether like that of 

 numerous other medium sized dull yellow and brownish mottled 

 forms, but LeConte removed it from the indefinite species and 

 included it in his table,'* from a fancied difference in the proster- 

 num. In the short description the prothorax is said to be nearly 

 three times as wide as long. This is the most extreme instance 

 known to me of this previously alluded to tendency of LeConte 

 to overestimate the greater dimension in terms of the smaller. 

 By careful measurement of the type I found the prothorax to be 

 L45 mm. wide and .85 mm. long, the width being nearly L7 times 

 the length. In the type the dark markings are ill-defined, the 

 scutellar region largely suffused with brownish, the middle mar- 

 ginal spot is only feebly indicated; the thoracic markings are 

 dark brown and rather broad in the labeled example, less dark 

 in the second specimen, in which also the elytral marks are smaller. 

 The front claws of the male are strongly enlarged, though not 

 ciuite to such an extreme as in caelatus. 

 78. Pachybrachys nubigenus new species 



Yellow, prothoracic markings broad, elytra with sutural region 

 more or less broadly suffused with pale reddish brown to almost 

 black, the color darker in tlie male; eyes in male separated by a 

 distance barely as great to evidently greater than the vertical 

 width of their upjier lobes; front with ocular lines; elytral punc- 

 tuation largely confused, marginal interspace numerously ])unc- 

 tate; front claws of male distinctly enlarged. Ave. length 3.3 

 mm, i^'outhern California. 



Head coarsely subevenly and mod(n-atcly closely punctate, i)redominantly 

 yellow; the antennal spots subobsolete, median spot rather small, rufo-testa- 

 ceous or brownish, vertex sj)ot usually darker. Eyes separated in the male by 

 slightly more than the length of the first two antennal joints, in the female by 



" Trans. Am. Ent. Soe. viii, p. 2()S, .July, 1880. 



