26 COLEOPTEEA OF INDIANA. 



(1(1. Aiiteuujv with the teruiiual joints forming a lamelhite clnh com- 



posed of movable plates cr leaves, capable of separation and 



usnaliy of aecnrate apposition; legs more or less fossorial ; 



tarsi tive-jolnted ; food variable, either decaying wood, dung, 



carrion or foliage. Series IV. I^amellicornia, p. !)0;>. 



1)1). Fourth and fifth tarsal joints firmly united, the fourth joint very 



small, the tarsi therefore appearing but four-jointed; sole usually 



densely pubescent; antennae filiform, rarely serrate or thickened 



towards tip; leaf-eaters or wood-borers. 



Series V. Phytophaga, p. 1005. 

 (/(/. Front and middle tarsi flve-jointed, hind tarsi four-jointed, the joints 

 usually slender and bare or at most sparsely haired or spinose; 

 other characters and food habits very variable. 



Series VI. IIetehomeka. p. 12-12. 



Series I. ADEPHAGA. 



The members of this series always have the mouth parts highly 

 developed, the outer lobe of the maxilla? being nearly always di- 

 vided into a two-jointed palpus, so that there appear to be six palpi. 

 Abdomen with the exposed segments one more in number at the 

 sides than along the middle, the number usually being five along the 

 middle and six at each side. They are for the most part active, pre- 

 daceous and carnivorous in habit. Five of the seven families com- 

 prising the series are represented in Indiana. 



KEY TO INDIANA FAMILIES OF ADEPHAGA. 



(/. Terrestrial si)ecies; antenn:e with at least the six outer joints pubes- 

 cent; metasternum with an autecox.al jtiece, separated by a well 

 marked suture, reaching from one side to the other and extending 

 in a triangular process between the hind coxse. 

 h. Antenn;e inserted on the front above the base of the mandibles ; 

 inner lolte of the maxilhe ending in a movable hook; eyes large 

 and prominent; head vertical, wider than thorax. 



Family I. Cicindelid.i;. p. 27. 



hb. Antennte arising from the side of the head between the base of the 



mandibles and the eyes; inner lobe of maxillte not ending in a 



movable hook; eyes usually of moderate size; head horizontal 



or slightly inclined, usually narrower than thorax. 



Family II. Cababid.e, p. 30. 

 (/'/. A(iuatic species; antennie destitute of i)ubescence ; metasternum (ex- 

 cept in Haliplidfe) without an antecoxal piece but prolonged behind 

 in a triangular process. 

 c. Eyes two; antennre slender and filifoi-m or setaceous; .abdomen 

 with six segments. 

 d. Antenme ten-jointed; hind coxte prolonged as large plates cover- 

 ing the femora and a large part of the abdomen ; hind legs not 

 formed for swinmiing. Family III. Haliplid.e, p. 200. 



