352 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



34. Fachybrachys nero Bowditch 



Dull pale 3'ellow, finely alutaceous, brown punctate, elytral 

 striae nearly regular, very lightly impressed; prothoracic M 

 usually pale and poorly defined, more rarely darker and quite 

 distinct; front with ocular lines; front claws of male not dis- 

 tinctly enlarged. Ave. length 3 mm. Arizona to western Texas. 



Head moderately ])imctate, spots small or moderate, that on the vertex 

 best developed ; ocular lines distinct, rather near the eyes as a rule but sometimes 

 a little more distant, notably in the type. Eyes separated by one and three- 

 fifths to one and four-fifths ( cf ) or by about two and three-fourths ( 9 ) 

 times the length of the basal antennal joint. Antennae long and thin, at- 

 taining the middle of the abdomen in the male, and the hind coxae in the female. 



Prof orax short, strongly transverse, sides nearly straight and moderately 

 convergent from base to apex; punctuation a little uneven, rather sparse 

 except in the darker areas, these varying from quite distinct to almost entirely 

 wanting; side margins rather broadly smooth. 



Elytra more than twice as long as the prothorax, sides parallel; punctures 

 confused in a small scutellar area, elsewhere forming nearly regular browoi 

 lines, submarginal stria nearly straight at base, marginal interspace without 

 punctures or with but one or two in the position of the subhumeral dislocation 

 of the eighth stria; discal intervals — more especially the second and third — wide 

 posteriorly, the second dilated in the usual position to form the moderate shield, 

 which is not at all more convex. 



Pi/gi'lium yellow, with sometimes a narrow basal blackish margin. Body 

 beneath brownish or fuscous with the usual paler margins. Legs pale. 



LenCfth 2.6 to 3.4 mm.; width 1.3 to 1.8 mm. 



Distribution. — Arizona: Type from Prescott. Several examples from this 

 locality are before me; also a number of specimens labeled simply "Ari." 

 New Mexico: Albuquerque (Wickham). Texas: Davis Mountains and Mac- 

 dona, July (Wenzel). 



All the Texas examples are females; they have a slightly dif- 

 ferent appearance, due perhaps more than anything else to a 

 little brighter color; I have little doubt, however, that they belong 

 here. 



35. Fachybrachys petronius new species 



Rather close to 7iero, the color a brighter yellow, surface finely 

 alutaceous but somewhat shining, prothoracic markings rather 

 broad and clearly defined, reddish brown, the median stripe 

 narrowly divided anteriorly by a pale line; elytral striae less 

 regular than in nero; often more or less suffused with brown along 

 the suture. Ave. length 3.1 nun. New Mexico and Arizona. 



Head moderately punctate, vertex spot conspicuous, others small; ocular 

 lines distinct, moderately distant from the eyes. Eyes separated by about 



