214 FAMILY iv. DYTISCID.T:. 



VII. CELINA Aube. ls:W. (A proper name.) 



Elongate, glabrous, parallel species having the scutellum dis- 

 tinct ; front and middle tarsi with five joints ; abdomen terminating 

 in a short spine. One species occurs in the State. 



408 (1282). CELINA ANGUSTATA Aubg, Spec. Gen., VI, 1838, 447. 



Elongate-oblong, parallel. Brownish-red, alutaceous, shining; elytra! 

 disk with a blackish cloud. Thorax three times as wide as long, sides 

 feebly rounded, disk very finely and sparsely punctate with coarser punc- 

 tures along the apical and basal margins. Elytra sparsely, finely and 

 irregularly punctate, with two or three discal rows of larger punctures; 

 their tips ending in fine points. Middle tibue of male curved and nar- 

 rowed at middle, the basal portion slender, the apical much broader. Length 

 4 mm. 



This is listed as a southern species, but a single specimen was 

 taken in Lake County, on the shore oi 1 ake Michigan, and another 

 in Kosciusko County. June 9- August 1. 



VIII. CCELAMBUS Thorn. 1SHO. (Gr., "swollen + belly.") 



To this genus belong a number of small, oval or rounded beetles, 

 convex beneath (whence the generic name), and in color either 

 brown or pale with black markings. All are devoid of pubescence, 

 possess the elytral ligula above mentioned and have the humeral or 

 basal portion of the epipleura? limited behind by a well-marked line. 

 Seven species are known from Indiana. 



KEY TO INDIANA SPECIES OF CCELAMBT S. 



<i. Front of head with a fine but distinct raised margin, the labruin much 

 concealed ; under surface of body very convex, usually light brownish- 

 yellow. 



1>. Elytra without either distinct blackish spots or a carina on the sides. 

 very coarsely and regularly punctured. 409. IN.EQUALIS. 



l>h. Elytra each with three or four black spots, and with a carina on the 

 side, the punctures much finer. 410. ACABOIDES. 



<KI. Front of head without margin, the labrnui little concealed; under sur- 

 face of body less convex, wholly or partly black. 

 c. Elytra without impressed lines; smaller, 2.5-4.5 mm. 

 (I. Elytra nearly uniform dark reddish-brown, usually with fine and 



coarse punctures intermingled. 

 e. Smaller, not over 3 mm. 



f. Abdomen wholly black: sides of hind coxte very coarsely and 



sparsely punctate. 411. TUEBIDVS. 



ff. Abdomen in part or wholly pale; sides of hind coxae finely 



punctate. 412. LACCOPHILINUS. 



ee. Larger, .">.S t mm.; abdomen and melasternnm as in tiirlridus. 



41:5. UISSIMILJS. 



