242 



SEHIICS II. CL.WICOUXIA. 



470 (l;jo(j). DiMaxKs assimilis Aiihi'", Slut, (ii'ii.. VI. ls:!S, TTS. 



()l)Ioii,!j;-()val, distinctly convex. Above black, strongly 

 i I bronzed; beneath black, very shining; abdominal segments 



/ Sim)^M.\ often tinged with brown; legs brownish-yellow. Elytra ot 

 male feeldy sinnate near tips, the latter but slightly sepa- 

 rated at suture, the angles but little produced backwards; 

 those of fcHialo more strongly sinuate both on side margins 

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

 the angles distinctl.v iirodnccd backwards. Length 10-11.5 

 mm. ( Fig. 111."!. I 



Throuyliout the Shite: coiinnoi]. May 'J-Septeni- 

 !)er 10. This is t\w species usually known as the 

 "apple-bug," on account <»f the odor exhaled from the milky fluid 

 exuded from anal segment. 



477 ( ). DiNEUTES HORNii Roberts, Trans. Amer. Ent. Soc, XXII, 1895, 



284. 

 Closely resembles assiniilis 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. Eength U.5-11 nnn. 



Lakes of northern Indiana; common. ?.Iay G-August 20. 



Gjirctcs siinialiis Lee, elongate-oval, dark Ijronzed, very .shin- 

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

 has been taken at Quincy. Illinois. 



Series II. CLAViCOKNIA. 

 This is a large and unvvieldly group of families having few cliar 

 aeters in conunon, except that the antenna; are enlarged to form a 

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

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

 the 5-jointed to the 1-jointed. In the tables which follow certain 

 families (whose numbers are given in ])arenthesis). and other sub- 

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

 most part belong to the Serrieornia, but their antennas are often so 

 (»b\i()usly chiyate as to lead the student amiss. Those whichthere 

 bel(»ng are also included in the Serrieornia table, where their aber- 

 rant character becomes at once apjxu-ent. In order to shorten and 

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

 into four groups or Subsei'ies, and I hes(^ in turn into families. 



KEY TO si IISEIUKS OF INDIANA FAMILIES OF ( LVVICORNl A. 



a. Elytra shoi't, leaving the greater part of the abdomen exposed above; 

 wings usually jii-cscnl. and when unt in use folded beneath the short 

 elytr.i; dorsal part uf the alulumen entirely luuai-like in te.xture; tar- 

 sal joints varying in number. 



Subseries A. I'.uachei.ytka Ciavicohnia, p. 243. 



*The nmnbpr of the family to which these subdivision.s belong is also inchided in parenthesis. 



