956 



FAMILY L . SOAEAIi MIDM. 



XXII. Sekica MacLeay. 1819. (Gr., "silken.") 



Robust, oblong, convex species of a brown color, often covered 

 with soft silken pubescence and with iridescent reflections. They 

 are of small size, and the body, especially that of female, is broader 

 behind; labrum united firmly with the under surface of clypeus, 

 and therefore indistinct; elytra feebly sulcate; hind coxae flat and 

 broadly dilated into a plate, as wide as any two ventral segments, 

 which covers the base of the abdomen. 



The beetles fly about chiefly in the evening and by day are to 

 be found beneath leaves, logs and bark in orchards and woods. 

 Five species have been taken in the State, two of which are here- 

 with described as new; while two others may occur. 



KEY TO INDIANA SPECIES OF SERICA. 



a. Clypeus with an acute notch each side ; body smooth, shining, not irides- 

 cent. 



&. Notch of clypeus deep, distinct, the margin in front of notch strongly 

 reflexed; surface of front and clypeus coarsely, confluently punc- 

 tured, with wrinkles between the punctures. 1805. vespertina. 

 &&. Notch of clypeus small and indistinct, margin less strongly reflexed; 

 surface finely punctured, without wrinkles or rugosities. 

 c. Suture between clypeus aud front with a distinct carina; surface 

 of clypeus aud thorax finely and densely punctured. 



1806. CARINATA. 



cc. Suture between clypeus and front impressed, without carina ; sur- 

 face of clypeus and thorax finely and sparsely punctured. 



1807. INTERMIXTA. 



aa. Clypeus without a notch on sides ; body usually silky-pubescent and 

 more or less iridescent. 

 d. Head and thorax with numerous short, erect yellowish hairs. 



IRICOLOR. 



(Id. Head and thorax not distinctly hairy. 



e. Size larger, 8 or more mm. ; body above unicolored. 



/. Upper surface black, feebly shining, scarcely iridescent; clypeus 

 densely and rather coarsely punctured. tristis. 

 //. Upper surface purplish-brown or piceous, distinctly iridescent; 

 clypeus more sparsely and finely punctate. 1808. sericea. 

 ee. Size smaller, not over 6 mm. ; head and thorax black or piceous, 

 elytra usually reddish-brown. 1809. trogiformis. 



1805 (5674). Serica vespertina Gyll., Schonh. Syn. Ins., I, 1817, 94. 



Oblong-ovate. Chestnut brown to piceous, smooth, shining. Clypeus 

 short, truncate, coarsely, densely and rugosely punctate, the notch deep, 

 distinct; frontal suture impressed. Thorax twice as wide as long, sides 



