26 



COLEOPTEKA OF INDIANA. 



dd interna with the terminal joints forming a lamellate club com- 

 posed of movable plates or leaves, capable of separation and 

 usually of accurate apposition; legs more or less fossorial ; 

 tarsi five-jointed; food variable, either decaying wood, dung, 

 carrion or foliage. Series IV. Lamellicornia, p. 903. 



W Fourth and fifth tarsal joints firmly united, the fourth joint very 

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

 densely pubescent; antenme filiform, rarely serrate or thickened 

 towards tip; leaf-eaters or wood-borers. 



Series V. Phytophaga, p. 1005. 

 aa Front and middle tarsi five-jointed, hind tarsi four-jointed, the joints 

 usually slender and bare or at most sparsely haired or spmose , 

 other characters and food habits very variable. 



Series VI. Heteromera. p. 1-4- 



Series I. ADEPHAGA. 



The members of this series always have the mouth parts highly 

 developed, the outer lobe of the maxillae 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 m 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. 



a Terrestrial species; antenna, with at least the six outer joints pubes- 

 cent ; metasternum with an antecoxal piece, separated by a well 

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

 in a triangular process between the hind cox*, 

 b. Antennae inserted on the front above the base of the mandibles 

 inner lobe of the maxilla, ending in a movable hook; eyes lai b e 

 and prominent; head vertical, wider than thorax. 



Family I. Cicindelid.f,, p. z<. 



k Antennae arising from the side of the head between the base, >f the 

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

 movable hook; eyes usually of moderate size; head horizontal 

 or slightly inclined, usually narrower than thorax. 



Family II. Carabid.e, p. 3b. 

 aa lauatic species; antenna, destitute of pubescence; metasternum ( ex- 

 ^Pt in Halipiidae) without an antecoxal piece but prolonged behind 

 in a triangular process. , i , nim 

 c. Eyes two; antenna, slender and filiform or setaceous; abdomen 



with six segments. 

 a Antenna, ten-jointed; hind coxa, prolonged as large plates cover- 

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

 formed for swimming. Family III. Haliplid^, p. 200. 



