THE GwOUXD BEETLES. 



17-") 



Fig. 94. Noihojius grosms Say ; a, antenna; b, maxilla 

 and palpi; c, mandible; d, tarsus. (After LeConte.) 



321 (1054). Xothopus grossus Say, Trans. Amor. Phil. Soc„ IV, 1834, 430. 



ibid, II, 543. 

 Robust, convex. Black, shining; 

 antenna? and legs piceous. Thorax 

 nearly twice as wide as long, as 

 wide at base as elytra ; basal mar- 

 gin depressed, especially so in the 

 region of the hind angles, which are 

 rectangular ; disk sparsely but rath- 

 er coarsely punctured near base and 

 apex. Elytral striae fine, not punc- 

 tured ; third, fifth and seventh in- 

 tervals each with five to eight dis- 

 tinct seta-bearing punctures. Length 

 14 mm. ; width 7 mm. (Fig. 94.) 



Known from Indiana by a 

 single specimen taken by Wol- 

 cott on the beach of Lake Michi- 

 gan, near Pine, Lake Comity. 

 July 25. Mr. Wolcott had pre- 

 viously taken a specimen near 

 Bloomington, Illinois. This is 

 the species usually known as N. 

 zabroides Lec. Say's description is. however, sufficient for deter- 

 mination and has priority. 



LXIII. Pratacanthus Dej. 1825. (Gr., "strong + spine. ") 



One medium-sized, oblong, convex beetle represents this genus 

 in the United States. It occurs about gardens and the borders of 

 cultivated fields, and is often thrown out by spading and plowing. 

 It is sometimes attracted by electric light. 



322 (1056). Ceatacanthus dubius Beauv., Ins. d'Amer., 1805, 108. 

 Oblong, convex. Piceous, glabrous; legs and antenna? reddish-brown. 



Thorax one-half broader than long ; sides broadly curved from apex to be- 

 hind middle, thence strongly sinuate to base, which is narrower than apex ; 

 basal impressions short, smooth or with a few coarse punctures. Elytral 

 striae deep, not punctured ; intervals slightly convex. Length 8-10 mm. 



Throughout the State : frequent. May 14— September 23. 



LXI V. Agonodertjs Dej . 1 825. ( dr.. ' ' without angle + neck. ' ' ) 



Small brownish-yellow oblong beetles, having the mentum not 

 toothed and the front tarsi alike in form in both sexes. Our species 

 diminish in size in the order given in key. They occur beneath 

 rubbish about gardens and cultivated fields. Several of them hi- 

 [12—23402] 



