COLEOPTERA. 



505 



North America," by LeConte and Horn. This work can be purchased 

 of the Secretary of the American Entomological Society, Philadelphia, 

 Pa. In the following pages we have followed closely the classification 

 proposed by these authors, and have made free use of the character- 

 izations given by them ; hence it will be easy for a student to pass 

 from a study of this chapter to the use of that indispensable work. 



TABLE FOR DETERMINING THE FAMILIES OF THE 

 COLEOPTERA.* 



A. Head not prolonged into a narrow beak ; palpi always flexible ; 

 two gular sutures at least before and behind (Fig. 601) ; prosternal 

 sutures distinct (Fig. 612) ; the epimera of the prothorax not meet- 

 ing on the middle line behind the prosternum (Fig. 612). 



Typical Coleoptera. 



B. Hind tarsi with at least as many segments as the others. 



C. Tarsi usually apparently four-jointed, the fourth segment 



being reduced in size so as to form an indistinct segment at 



the base of the last segment, with which it is immovably united 



(Fig. 615, 4) ; the first three segments of the tarsi dilated and 



Fig. 615. 



Fig. 616. 



Fig. 617. 



brush-like beneath ; the third segment bilobed. In a single 

 family, the Spondylidae, the fourth segment of the tarsus, 

 although much reduced and immovably united with the fifth, 

 is distinctly visible, the first three segments are but slightly 

 dilated, and the third is either bilobed or not (Fig. 616, a 



and b) Phytophaga. 



D. Fourth segment of tarsus distinctly visible ; segments of 

 antennae with deep impressions containing the organs of 

 special sense (Fig. 617). p. 566 Spondylidje. 



* This table is based largely on the tables given by Le Conte and Horn. 

 Aid was also derived in its preparation from the table of European Coleop- 

 tera by L. Redtenbacher. 



