COLEOPTERA 



i33 



F. Posterior coxas not prominent, flat, covered by the femora in repose. 



Cleridce, Corynetida 



FF. Posterior coxas more or less conical and prominent at least internally, 

 not covered by the femora in repose. 

 G. Anterior coxae long, with distinct trochantins. 

 H. Abdomen with seven or eight ventral segments. 

 I. Middle coxae contiguous; epipleurae distinct. 



J. Episterna of metathorax sinuate on inner side, epipleurae 

 usually wide at the base. 

 K. Head more or less covered; antennae approximate or 

 moderately distant; metathoracic epimera long. p. 144. 



Lamfyrid^e 



KK. Head exposed; antennae distant; metathoracic epimera 



wide PhejigodidcB 



JJ. Episterna of metathorax not sinuate on the inner side; 



epipleurae narrow at the base. p. 145 Cantharid^e 



AA. Hind tarsi either only three-jointed, or four-jointed but apparently only three- 

 jointed, the third joint being small and concealed in a notch at the end of the 

 second joint. (See also AAA.) 

 B. Wings fringed with long hairs. A minute aquatic species from S. Cal. and 



Ariz. {Hydroscapha.) p. 141 Hydrophiud^e 



BB. Wings not fringed with hairs. 



C. Tarsi with second segment dilated. 



D. Tarsal claws appendiculate or toothed; first ventral abdominal segment 



with distinct curved coxal lines, p. 152 Coccinellid^e 



DD. Tarsal claws simple; first ventral abdominal segment without coxal 



lines Endomychidce 



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

 middle tarsi also, with five segments. 

 B. Anterior coxal cavities closed behind. 

 C. Tarsal claws simple. 



D. Abdomen with five ventral segments. 



E. Ventral abdominal segments in part grown together. 



F. Next to the last segment of the tarsi spongy beneath Lagriidce 



FF. Penultimate segment of tarsi not spongy, p. 151 Tenebrionid^e 



BB. Anterior coxal cavities open behind. 



C. Head not strongly and suddenly constricted at base. 

 D. Middle coxas not very prominent, antennas free. 

 E. Prothorax margined at the sides. 



F. Middle coxal cavities entirely surrounded by the sterna. 



Cryptophagidce 



FF. Epimera of mesothorax reaching the coxae. 



G. Metasternum long; epimera of metathorax visible. .Melandryida 

 GG. Metasternum quadrate; epimera of metathorax covered, p. 152. 



Cucujid^e 



EE. Prothorax not margined at the sides Pythidce 



DD. Middle coxas very prominent (Edemeridtz 



CC. Head strongly constricted at base. 



D. Head prolonged behind and gradually narrowed Cephaloidcc 



DD. Head suddenly narrowed behind. 



E. Hind coxas not prominent or but slightly so, anterior coxas globular, not 



prominent, p. 152 Cucujid^e 



EE. Hind coxas large, prominent. 



F. Tarsal claws simple; head horizontal Pyrochroidce 



FF. Claws cleft or toothed, front vertical, p. 145 .Meloide: 



TABLE VI. — THE FAMILIES OF THE LAMELLICORNIA 



A. Plates composing the club of the antennas flattened and capable of close apposi- 

 tion. 



B. Abdomen with six visible ventral segments, p. 154 Scarab,eid.e 



BB, Abdomen with five visible ventral segments. 



