242 SERIES II. — ci,Avrc(iRxiA. 



476 (153C). Dl>,'i:rTEs as.-,imu.i.s Aube. Sper. Gen.. VI. is.'is. 7TN. 



Obloiiu'-oval. distiuftly Oduve.x. Ab:ive b!;R-k. strougly 

 brouzed : beneath bbiek, vei-.v sblniug : abdoiuinal segments 

 often tinired with brown; leiis browuisli-yellow. Elytra of 

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

 rated at suture, the angles but little i.mduved back\yarils : 

 those of female more strongly sinuate both on side margins 

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

 the angles distinctly prciduced backwards. Length lt>-ll..j 

 mm. I Fig. V23.) 



Fig. 123. X 2i. Throughout the State: common. ]\Iay V-Septem- 

 rigina.) -^^^^ -^g ipjjjg j^, +t^p speeies usually known as the 



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

 exuded from anal segment. 



4TT ( ). DiXEUTES HOKXii Roberts. Trans. Amer. Ent Soc. XXII, Is'.!.",. 



284. 

 Closely resembles us.siiiiiUs but usually smaller, more obovate. Distin- 

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

 female more widely separated at apex. Length O.-j-ll mm. 



Lakes of northern Indiana : common. ]\Iay 6-August 20. 



G!jrrt(s sinuaius Lee, elongate-oval, dark bronzed, very shin- 

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

 has been taken at Quiiiey. Illinois. 



Series II. CLAVICORNIA. 

 This is a large and un\\'ieldly group cf families having few char 

 actera in common, 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 its feeblest value, as every possible variation exists from 

 the 5-jointed to the 1-jointed. In the tables which follo\v certain 

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

 division.s* (whose names are given in italics >. rightfully for the 

 most part belong to the Scrrieornia, but their antennie 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 tirst di^dded 

 into four groups cv Subseries, and th"se in turn into families, 



KEY TO StBSERIES OF I^-niA-\.V E.\M1LH;S OF CI.U-UOK.NIA. 



a. Elytra sliort. leaving the greater part of the abdomen e.xpnsed above; 

 wiii-s usually present, and when ivit in use folded beneath the short 

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

 sal joints varying in iininber. 



i^ubseries A. Bkachelytka Ci^\.vIC0R^'IA. p, 243. 



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



