12-1:2 SERIES VI. HETEROMERA. 



entire body, subserrate. Thorax a little wider at base than long, sides fee- 

 bly curved, surface densely punctured. Elytra slightly wider at base than 

 thorax, together nearly as wide as long; striie indistinctly punctured, inter- 

 vals flat, finely and rugosely punctured. Length 2-2.5 mm. 



Floyd CoiintN' ; rare. June 28. Readily known by the great 

 long'th of antcnna\ 



Series \'I. HETEROMERA. 



This series is sharply limited and is distinguished primarily, as 

 the name implies, by the different number of tarsal joints, those of 

 the front and middle legs always having five, while the hind legs 

 have but four.* The food of the larvie is exceedingly variable, but 

 consists for the most part of decajdng vegetable matter, as rotten 

 wood and fungi. Some, however, are carnivorous or parasitic. The 

 following families of the series are represented in Indiana : 



KEY TO INDIANA FAMILIES OF HETEliOMERA. 



a. Front coxal cavities closed behind. 

 h. Tarsal claws simple. 



c. Next to last joint of tarsi not spongy beneath ; front cox;e short, 

 not projecting from the cavities ; tarsi without lobes beneath ; 

 anteniije usually more or less bead-like, as long as head and tho- 

 rax ; color almost always black or dark brown. 



Family LV. Tenebbionid.e, p. 12-io. 

 cc. Next to last joint of tarsi spongy beneath ; front coxae more promi- 

 nent ; form elongate, slender ; thorax in our species subcylin- 

 dric-il, narrower than elytra; length 7-14 mm. 



Family LVIl. IjAgriid.k, p. 12S4. 

 hh. Tarsal claws pectinate or comb-lilie; form usually elongate-oval, con- 

 vex; thorax not narrowed behind and usually as wide at base as 

 elytra, its side margins distinct ; color usually brownish ; length 

 less than 12 mm. Family LVI. Cistelidk. p. 1270. 



iia. Front coxal cavities open behind. 



(I. Head not strongly and suddenly conslricted behind the eyes. 

 c. Middle cox.h' not very prominent. 



/. Th<ii-ax margiut'd at sides, broad at base, its disk with basal im- 

 liressions; fonii usually elongate, loosely jointed; maxillary 

 paliii usu.illy long and pendulous, with the joints enlarged. 



F.iuiily LVIII. Melandryid.^, p. 12sri. 

 /'/. 'I'liornx not margined, narrower behind, disk not impressed at 

 liase; form usually long and narrow; bead sometimes pro- 

 longed into a lienU. Family LIX. I'rrmn.E, p. l;;o2. 



*lt. would seem that the family Sphiiulida' should be placed here, though usually classed with the Serricornia. 



