242 



SERIES II. — CLAVICOKNIA. 



476 (1530). Dineutes assimilis Aube, Spec. Gen., VI. 1838, 778. 

 Oblong-oval, distinctly convex. Above black, strongly 



bronzed ; beneath black, very shining ; abdominal segments 

 often tinged with brown ; legs brownish-yellow. Elytra of 

 male feebly sinuate near tips, the latter but slightly sepa- 

 rated at suture, the angles but little produced backwards; 

 those of female more strongly sinuate both on side margins 

 and near tips, the latter more widely separated at suture, 

 the angles distinctly produced backwards. Length 10-11.5 

 mm. ( Fig. 123.) 



Fig. 123. x2|. Throughout the State; common. May ^-Septem- 

 ber 19. This is the species usually known as the 

 ' ' apple-bug, ' 5 on account of the odor exhaled from the milky fluid 

 exuded from anal segment. 



477 ( ) . Dineutes hornii Roberts, Trans. Amer. Ent. Soc, XXII, 1895, 



2S4. 



Closely resembles assimilis but usually smaller, more obovate. Distin- 

 guished by the elytra of males having the sutural angles rounded, those of 

 female more widely separated at apex. Length 9.5-11 mm. 



Lakes of northern Indiana ; common. May 6-August 20. 



Gyretes sinuatus Lee. elongate-oval, dark bronzed, very shin- 

 ing, sides of thorax and elytra densely punctured and pubescent, 

 has been taken at Quincy. Illinois. 



Series II. CLAVICORNIA. 



This is a large and unwieldly group of families having few char 

 acters in common, except that the antennas are enlarged to form a 

 more or less distinct club toward the tip. It is here that the tarsal 

 system has its feeblest value, as every possible variation exists from 

 the 5- jointed to the l-jointed. In the tables which follow certain 

 families (whose numbers are given in parenthesis), and other sub- 

 divisions* (whose names are given in italics), rightfully for the 

 most part belong to the Serricornia. but their antennas are often so 

 obviously clavate as to lead the student amiss. Those which there 

 belong are also included in the Serricornia table, where their aber- 

 rant character becomes at once apparent. In order to shorten and 

 simplify the key to families of Clavicornia the Series is first divided 

 into four groups or Subseries. and these in turn into families. 



KEY TO SUBSERIES OF INDIANA FAMILIES OF CLAVICORNIA. 



a. Elytra short, leaving the greater part of the abdomen exposed above; 

 wings usually present, and when not in use folded beneath the short 

 elytra; dorsal part of the abdomen entirely horn-like in texture; tar- 

 sal joints varying in number. 



Subseries A. Brachelytra Clavicornia, p. 243. 



* The number of the family to which these subdivisions belong is also included in parenthesis. / 



