i32 THE STUDY OF INSECTS 



C. Posterior coxa' widely separated, eyes wanting or inconspicuous, p. 142. 



SlLPHIDJE 



CC\ Posterior coxae approximate, and not laminate, eyes with small facets. 



p. 142., SlI.PHID/E 



BB. All tarsi four-segmented ; hind coxae contiguous and with plates covering 

 the femora entirely or in part. p. 142 Silphid^e 



BBB. Hind tarsi with only four segments; the fore tarsi, and almost always the 

 middle tarsi with five segments, p. 142 SilphiDjE 



TABLE V. — THE FAMILIES OF THE PALPICORNIA, POLYFORMIA, 



AND CLAVICORNIA* 



It is impracticable to separate these three series of families in these tables, owing 

 to the fact that characters sharply separating them have not been found. 

 A. Hind tarsi five-jointed. 



B. Maxillary palpi as long as or longer than the antennas, p. 141 .. . .HvDROPHiUDyE 

 BB. Maxillary palpi much shorter than the antennae. 



C. Tarsal claws very large; the first three abdominal segments grown together 



on the ventral side Psephenidce, Dryopida, Elmida 



CC. Tarsal claws of usual size; ventral abdominal segments usually free, some- 

 times (Buprestidae) the first two grown together. 

 D. Abdomen with not more than five ventral segments. 



E. Femur joined to the apex or very near the apex of the trochanter. 



Ptinida, Anobiidce, Bostrichida, Lyctida 



EE. Femur joined to the side of the trochanter. 



F. Anterior coxae globular or transverse, usually projecting but little from 

 the coxal cavity. 

 G. Anterior coxa transverse, more or less cylindrical, posterior coxae 

 grooved for the reception of the femora. 



Nosodendridcc, Byrrhidce, Chelonariidce, et al. 



GG. Anterior coxae globular. 



H. Presternum with a process which extends backward into a groove 

 in the mesosternum. 



I. Eye continuing the general line of the head, the head usually 



buried in the thorax up to the eye. Prothorax closely dove- 

 tailed into mesothorax below. First ventral suture of abdomen 

 much weaker than the others, usually partly lost. p. 148. 



BUPRESTID/E 



II. Eye usually prominent, frequently separated by a space from 

 prothorax; articulation between pro- and mesothorax usually 

 freely movable; first three ventral sutures of abdomen similar 

 and deep. ( Not movable as usually reporte.) p. 147 . . . Elaterid/e 



HH. Presternum without a process received by the mesosternum, 

 although it may be prolonged so as to meet the mesosternum. 



I. Posterior coxae contiguous Phalacridce 



II. Posterior coxae separated. 



J. Body depressed; middle coxal cavities not closed externally 

 by a meeting of the mesosternum and metasternum. p. 152. 



CuCUJIDjE 



JJ. Body more or less convex; middle coxal cavities entirely 

 surrounded by the sterna. 



Mycetophagidce, Cryptophagidcc, ErotylidcB 



FF. Anterior coxae conical, and projecting prominently from the coxal 

 cavity. 

 G. Posterior coxae dilated into plates partly protecting the femora, at 

 least at their bases. 



H. Antennae serrate or flabellate Rhipiceridce 



HH. Antennae with the last three segments forming a large club. 



I. Tarsi with second and third segments lobed beneath. . . .Byturida 



II. Tarsi simple, p. 150 Dermestid^e 



DD. Abdomen with six or more ventral segments. 



E. Anterior coxae globular Cebrionidce, Plastoceridce 



EE. Anterior coxae conical. 



* Families italicized are not discussed in this manual. 



