Dec, 1922.] Dawson : New Species of Serica. 165 



Serica elongatula Horn. 



Serica elongatula Horn, Trans. Amer. Ent. Soc, iii, p. 77, 1870. 



(^. Length, 6.5 mm. ; width, 3.3 mm. Color bay to chestnut, subopaque 

 and faintly sericeous. 



Clypeus not at all depressed, the anterior, reflexed margin distinctly but 

 not suddenly elevated, the angle of elevation from the plane of the clypeus 

 being about 45 degrees ; anterior margin viewed perpendicularly only feebly 

 arcuate medially, viewed at an angle from " above slightly more prominent 

 at the middle and sloping to the sides ; angles broadly rounded, and lateral 

 margins less strongly elevated than the anterior ; clypeal incisure distinct but 

 very shallow and obtuse ; clypeal puncturation moderately strong, the punc- 

 tures separated by about their own diameters. Front less densely and regu- 

 larly punctate than the clypeus, occipital area often impunctate. Antermal 

 club large, slightly exceeding the total length of the antenna. Eyes com- 

 paratively small. Measurements of head : diameter of head through eyes, 

 18; distance between the inner eye margins, 12.3; length of head on median 

 line, 13; extreme width of clypeus in front of incisure, 10.3; antennal club, 

 9.4 ; dorso-ventral diameter of eye, 6. 



Pronotum nearly twice as wide as long, very convex, slightly wider at 

 the middle than at the base, with the margins strongly and nearly evenly 

 arcuate when viewed from the side ; posterior angles strongly rounded and 

 anterior angles rectangular ; surface with small, evenly distributed punctures, 

 separated on the average by about twice their own diameters. Measurements 

 of pronotum: width through posterior angles, 28; width through middle, 30; 

 width through the anterior angles, 19; length on^median line, 16. Scutellum 

 subopaque, finely and quite evenly punctate, except for the shining and im- 

 punctate apex; length, 6.5; width, 7. 



Elytral striae distinct and line-like, each with a row of rather small, 

 closely and irregularly placed punctures ; interspaces sparsely punctate, nearly 

 flat, the second, fourth and sixth slightly wider than the others. Length 

 of elytra, 46; greatest width, 33. 



Metasternum and posterior coxal plates, especially the latter, closely 

 and rather coarsely punctate, abdomen finely and sparsely punctate. Under 

 surface very sparsely clothed with rather long, fine, ochraceous-buff hairs, 

 which become coarser, denser and much more conspicuous on the coxae and 

 femora of the front and middle legs. 



The genital armature of the male (PI. XXI) measures 1.8 mm. 



Specimens examined : 6 (^, California. 



The drawings and above description are from a specimen labeled 

 " Cal." " Horn Coll. H. 5683." The Horn collection contains four 

 additional male specimens also labeled " Cal." There is, however, 

 in the Le Conte collection a single male bearing the label '' Owen's 

 Valley, California. Serica elongatula Horn." Since the labels are 



