360 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



This is one of our largest species, and in point of size is not 

 closely approached by any other of this group. It most nearly 

 resembles fortis, which because of the feeble markings of the 

 elj^tra has been placed among the mottled species. As stated 

 above, however, one example of crassus shows small lateral spots 

 on the elytra, and it is not unlikely that specimens of fortis may 

 occur without elytral spots, in which case the tSvo species might 

 easily be confused. The eyes \n fortis are less approximate than 

 in crassus, and in the female are more widely distant than the 

 vertical width of their upper lobes; the marginal interspace of 

 the elytra is also more numerously punctate in fortis. 



42. Pachybrachys longus Bowditch 



Pale yellow, scarcely shining, brown punctate, head and pro- 

 thorax lightly marked with pale brown or rust colored spots or 

 clouds; elytra typically without spots, but occasionally with the 

 spots faintly indicated; eyes narrowly separated, ocular lines fine 

 and near the eyes, elytral striae subregular; front claws of male 

 perceptibly but not conspicuously larger than the others. Ave. 

 length 2.7 mm. Arizona. 



Head moderately punctate, more closely on the vertex and in the median 

 impressed line. Eyes separated by rather less than ( cT), or by about the length 

 ( 9 ), of the basal antennal joint or a trifle more. Antennae pale, outer joints 

 dusky, in the male about three-fourths and in the female about one-half the 

 length of the body. 



Prothorax moderately transverse, sides moderately rounded, incurved a 

 little at base, not greatly narrowed anteriorly, somewhat irregularly punctate, 

 more closely in the dark areas, rather sparsely elsewhere, side margins smooth. 



Elytra confusedly punctate in a rather small baso-sutural area, elsewhere 

 with subregular striae, the fifth and sixth, however, often more or less broken 

 or irregular; striae a little impressed, more noticeably so toward the sides; 

 marginal interspace with at most a few punctures near the subbasal inter- 

 ruption or sinuation of the eighth stria; shield usually well developed. 



Pygidium and lower surface brownish or fuscous and yellow, the colors dis- 

 tributed as usual; legs pale yellow with light brownish shades at middle of 

 thighs. 



Length 2.4 to 3 mm.; width 1.25 to 1.6 mm. 



Distribution. — Arizona: Tucson (Wickham), July 21 (Hul)l)ard & Schwarz). 



The type in the Bowditch Collection is a femal(% also from 

 Tucson. 



This species is notable in its narrowly separated eyes, which 

 character will distinguish it from others of lik(> api)earance. 



