202 MEMOIRS ON THE COLEOPTERA 



antennal club. It is peculiar to the Pacific coast regions. The 

 following is another species allied to depressa but smaller and more 

 convex: 



Platysoma pinorum n. sp. Oblong, shining, deep black, the antennae 

 piceous, the club pale; legs black; head fully two-fifths as wide as the 

 prothorax, smooth transversely concave anteriorly, with the stria entire, 

 transverse; prothorax one-half wider than long, the sides feebly converg- 

 ing and straight, rounded anteriorly and becoming transverse; sinus deep, 

 margined medially, transverse; base just visibly arcuate, the adjacent 

 punctulation only visible laterally; surface convexly declivous laterally 

 and with sublateral punctures nearly as in depressa; elytra barely as wide 

 as the prothorax and two-fifths longer, parallel, the feebly arcuate sides 

 rounding and converging apically, the surface evidently convex, impunc- 

 tate, excepting a few scattered punctules along the convexly declivous 

 apical margin; striation throughout as in depressa; under surface and 

 pygidia nearly as in that species. Length 2.8 mm.; width 1.45 mm. 

 North Carolina (Southern Pines and Asheville). Two examples of 

 undetermined sex. 



Although at first sight very similar to depressa, this species may 

 be known by its more abbreviated form, the broader prothorax, 

 the more convex lateral slopes of the pronotum and more depressed 

 basal and apical angles, the sides at apex rounding in more, becoming 

 transverse; the anterior tibiae are similarly quadridentate. 



Platysoma quadrifera n. sp. Parallel, subcylindric though only moder- 

 ately slender, deep black, shining, the legs rufo-piceous; head moderate, 

 finely, rather closely punctate, moderately and not abruptly concave 

 anteriorly, the frontal part of the stria straight and entire; prothorax 

 quadrate, scarcely wider than long, the parallel sides feebly arcuate 

 basally, strongly rounded apically, the apical sinus rather abrupt, not 

 margined; base transverse, subarcuate, bordered throughout with distinct 

 confused punctures; surface finely punctate, sparsely medially, gradually 

 less sparsely laterad, the marginal bead fine but strong; elytra equal in 

 width to the prothorax and barely more than a third longer, having five 

 entire moderate discal striae, the sutural tending to slight disintegration 

 very near the base; apices with a few fine punctures; pygidia both coarsely 

 and rather closely punctate; under surface moderately punctate, coarsely 

 at the sides; beaded margin of the broadly rounded prosternal lobe entire, 

 the mesosternum sinuate, but with the usual broad convex margin com- 

 pletely wanting, except at the sides. Length 2.5-2.9 mm.; width 1.0-1.15 

 mm. North Carolina (Southern Pines and Asheville) and Alabama 

 (Auburn). Five examples. 



Differs from parallela in its rather larger size, coarser pygidial 

 sculpture and obsolete mesosternal margination, which character is 

 as in aqua. I see but little or no allusion to the very coarse deep 



