COLEOPTERA. 513 



L. Anterior coxae separated by the horny 

 prosternum. 

 M. Body depressed, head free. p. 538. 



MYCETOPHAGID^E. 

 MM. Body cylindrical, thorax prolonged 



over the head. p. 554 CIID^E. 



LL. Anterior coxae contiguous, prosternum 



semimembranous. p. 543 GEORYSSIDJE. 



BB. Hind tarsi with only four segments, the fore tarsi, and almost 

 always the middle tarsi also, with five segments. 

 C. Anterior coxal cavities closed behind. 

 D. Tarsal claws simple. 



E. Abdomen with five ventral segments. 



F. Ventral abdominal segments in part grown together. 

 G. Next to the last segment of tarsi spongy beneath, 



p. 584 LAGRI ID;E.. 



GG. Penultimate segment of tarsi not spongy, p. 582. 



TENEBRIONID^E 

 FF. Ventral abdominal segments free. 



G. Anterior coxal cavities confluent, p. 584. 



OTHNIID^E. 



GG. Anterior coxal cavities separated by the proster- 

 num. 

 H. Elytra truncate, tip of abdomen exposed. (Rhizo- 



phagus.) p. 541 NITIDULID^E. 



HH. Elytra! entire, p. 554 SPHINDIDJE.. 



EE. Abdomen with six ventral segments. 



F. The first two ventral abdominal segments grown to- 

 gether ; the last two closely united, p. 584.^EGIALITID^E.. 

 FF. Ventral abdominal segments free. p. 529. 



SILPHID/E. 



DD. Tarsal claws pectinate, p. 584 CISTELID^. 



CC. Anterior coxal cavities open behind. 



D. Head not strongly and suddenly constricted at base. 

 E. Middle coxae not very prominent. 

 F. Antennae received in grooves, p. 584. ..MoNOMMiD^E. 

 FF. Antennae free. 



G. Prothorax margined at the sides. 

 H. Middle coxal cavities entirely surrounded by the 



sterna, p. 538 CRYPTOPH AGID.E. 



HH. Epimera of mesothorax reaching the coxae. 



