386 AMERICAN PACHYBRACHYS (cOLEOPTERa) 



those of the marginal series small and rather sharply defined, dark brown, the 

 two posterior connected; inner spots represented by vague diffuse brown 

 shades, a darker sutural spot at the beginning of the declivity. 



Pygidium brown and yellow. Body beneath dark brown with abdominal 

 sides and apex pale. Legs pale with small diffuse slightly darker median 

 clouds on the femora and tibiae. 

 Length 2.25 to 2.4 mm.; width 1.25 to 1.3 mm. 



Distribution. — Texas: Brownsville, Apr. 12 to May 20 (Dury), type cf ; St. 

 Tomas, Brownsville, April (>Schaeffer). 



This species may easily be confused with texamis, which occurs 

 abundantly in the same region, but the latter has more approxi- 

 mate eyes, strongly modified male front tibiae, and the standard 

 elytral spots are disposed as usual. The sutural s])ot on the 

 convexity in duryi is not large, but is quite conspicuous, and will 

 probably prove characteristic. 



70. Pachybrachys gracilipes new species 



Of medium size, rather brightly black and yellow mottled; 

 eyes in the male separated by a distance which is less, and in the 

 female more, than the vertical width of their upper lobes; no 

 ocular lines; front tibiae scarcely widened apically; front claws 

 of male small. Ave. length 2.85 mm. Western Texas. 



Head not wider than the thoracic apex, markings light to heavy, punctuation 

 close in the dark areas, elsewhere sparse. Eyes separated by one and one-third 

 (cT) or one and three-fourths ( 9 ) times the length of the basal antennal joint. 

 Antennae thin, fully three-fourths the length of the body in the male, the 

 tenth joint three times as long as wide; in the female scarcely more than half 

 the length of the body; color yellow, outer joints blackish as usual. 



Prothorax moderately narrowed in front, widest at basal third, sides broadly 

 arcuate, slightly incurved basally; punctuation rather coarse and close in the 

 dai"k areas, which vary much in development but are quite sharply defined 

 and usually rather broad; side margins smooth. 



Elytra with striae two to three and seven to eight entire and evidently im- 

 pressed, the outer ones rather strongly so; striae four to six much broken or 

 confused anteriorly, but distinct on the posterior convexity; shield distinct, con- 

 vex, sub-triangular; marginal interspace without punctures, the submarginal 

 stria deflexed to the margin behind the shoulder. 



Pygidium black with the usual oblique converging yellow spots. Body 

 beneath black, a yellow spot usually present at side of last ventral segment, 

 and the sides of the abdomen sometimes narrowly yellow. Legs yellow with 

 sharply defined black rings on the femora and tibiae. 



Length 2.7 to 3 mm.; width 1.4 to 1.G5 mm. 



Distribution.— Texas: Alpine, 4,400 to 6,000 ft., June 28 to 30 (\>'ickham) 

 type cf ; Davis Mountains, Chisos Mountains and Green ^'alley, Chisos Moun- 

 tains, July 9 to 10 (Wenzel). 



