98 R. W. Dawson 



1919-1922. Dawson: "New Species of Serica," parts 1-5, Journ. 

 N. Y. Ent. Soc, xxvii-xxx. (Descriptions and figures of 

 28 species.) 



SYNOPSIS OF THE SPECIES 



1. Surface of elytra bare, polished and shining 5 



Surface of elytra more or less opaque, often with a more or less 

 distinct, iridescent bloom 2 



2. Surface very opaque, in fresh, clean specimens velvety and show- 

 ing a brilliant, iridescent sheen of rainbow colors when held at 

 varying angles to the light 3 



Surface semi-opaque, not velvety, and without brilliant irides- 

 cence 4 



3. Clypeus (viewed from the side) uniformly and rather closely 

 covered with erect, brown hairs; surface lustre of pronotum 

 similar in the male and female mystaca 



Clypeus with only a few erect hairs anteriorly; surface of pro- 

 ontum more or less distinctly polished and shining in the female, 

 and oqaque in the male sericea 



4. Pallid, yellowish brown in color with little or no iridescence, form 



more elongate and slender curvata 



Dark brown to blackish, often with a distinct purplish sheen; 

 form rather short and robust anthracina 



5. Color yellowish brown or ochraceous; notch between apical and 

 lateral reflexed margins of clypeus deep, relatively broad, and 

 and rounded at the bottom ochrosoma 



Color varying from chestnut to a very dark reddish brown; 

 clypeal notch less strongly developed, narrower and often acute 

 at the bottom 6 



6. Clypeus and mid-lateral areas of pronotum rather finely and very 

 densely punctured, the punctures separated by less than half 

 their own diameters; sutural margin and median line of front 

 distinctly keeled or elevated evidens 



Clypeus and pronotum more coarsely and less densely punctured, 

 the punctures of the pronotum rather evenly distributed from 

 side to side; sutural margin of front feebly, or not at all, car- 

 inated, raised median line of front usually obsolete 7 



7. Claspers of male genital armature similar in shape and 

 size intermixta 



204 



