38 Journal New York Entomological Society. t Vo1 - xxyii. 



were it not for the striking and indisputable evidence furnished 

 by the structure of the genital armatures of the males of the 

 two species. 



Serica ochrosoma new species. 



cf. Length, 7.5 mm. ; width, 3.75 mm. Color dull yellowish brown, much 

 resembling that of Cyclocephala immaculata; upper surface bare, polished and 

 shining ; beneath shining, except for a slight pruinose lustre on anterior coxae 

 and lower portion of anterior femora and a slight opacity of the abdominal 

 sternites ; especially the last one. 



Clypeus neither depressed nor elevated, but exactly continuous with the 

 smooth, even convexity of the front ; anterior margin suddenly and rather 

 strongly reflexed ; reflexed tip, viewed from in front, strongly and evenly 

 arcuate ; lateral margins of clypeus elevated to about half the extent of the 

 anterior elevation ; lateral incisure deep, obtuse and conspicuous, entirely 

 dividing the elevated margin ; punctures moderately fine, except for a 

 few coarse ones just before the anterior reflexed margin, closely and evenly 

 placed, separated by about their own diameters, or a little less, and inter- 

 spersed with a microscopic, secondary puncturation ; clypeal suture very fine, 

 and inconspicuous, though easily traceable. Front with the same double 

 puncturation as the clypeus, but the coarser punctures separated by one to 

 three times their own diameters. Antennal club rather long, about equaling 

 the total length of the antenna. Eyes rather large. Measurements of head 

 as follows: Diameter of head through eyes, 20; distance between inner eye 

 margins, 12.3; length of head on median line, 15; extreme width of clypeus 

 in front of incisure, 9; antennal club, 8; dorso-ventral diameter of eye, 7.6. 



Pronotum one and two-thirds times as wide as long, rather strongly con- 

 vex, sides but little convergent through the posterior two-thirds of their 

 length, then eloping more abruptly to the anterior angles, very uniformly and 

 rather closely punctate ; posterior angles of pronotum often showing traces of 

 an oblique impression, and in front of this, about three-fifths of the way to the 

 anterior margin of the pronotum, a slightly impressed spot showing a per- 

 sistent tendency to be clouded with dark brown. The pronotal measure- 

 ments are as follows: Width through the posterior angles, 30; width through 

 the anterior angles, 20; length on the median line, 19. Scutellum less shin- 

 ing than the pronotum and elytra, with the punctures crowded to the sides ; 

 length, 8; width, S. 



Elytra rather strongly striated, the striae clearly defined or line-like, 

 and the interspaces of uniform width and quite evenly convex ; punctures 

 fine and discrete, rather evenly distributed and showing but little if any tend- 

 ency to be arranged in lines ; surface of elytra with a barely discernible 

 sericeous luster and microscopic secondary puncturation. Length of elytra, 

 55 ; greatest width, 38. 



Metasternum and posterior coxal plates, especially the latter, shining, 

 coarsely and closely punctate and microscopically alutaceous. Second, third, 



