242 SERIES II. CLAVICORNIA. 



47<; (1530). DIMKI-TKS AS.--IMIMS Aulie. Spec. (Jen.. VI. is:;s. 77*. 



Oblong-oval, distinctly convex. Above black, strongly 

 brnn/ed: beneath black, very shining; abdominal segments 

 often tinned 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 mure widely separated at suture, 

 the angles distinctly produced backwards. Length 10-11.5 

 mm. ( Fig. 1-3.) 



Fig. 12!" x 2;-. Throughout the State: common. May 'J-Septem- 

 iier 19. This is the species usually known as the 

 "apple-bug." on account, of the odor exhaled from the milky fluid 

 exuded from anal segment. 

 477 ( -). DINEUTES HORNII Roberts, Trans. Amer. Ent. Soc., XXII, is'.ir., 



284. 



Closely resembles (ixximilis but usually smaller, more obnvate. Distin- 

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

 female more widely separated at apex. Length '.(.5-11 mm. 



Lakes of northern Indiana ; common. May b'-August 20. 



Gyrdi'x siitti<ilus 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 

 ;;cters in common, except that the antenn;e 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-jointcd to the 1-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 antenna? 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 charact'-r 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. 



KKV TO sniSKHIKS OF INDIANA FA.MIIIKS (II ( I.A VICOKN I A. 



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. UUACIIKI.YTKA ( 'I.AVICOKMA, p. U4o. 



*Tbf ininil'iT f the family to \shirh these subdivision* belong is also included in parenthesis. 



