ORDER COLEOPTERA. 



109 



Family Lampyrid*. Ventral segments 7 to 8; antennae serrate, 

 rarely pectinate or flabellate, inserted on the front ; skin rather thm ; 



f 



FIG nS.Photinus'pyralis, fire-fly. Natural size, n, larva; 6, pupa; /, head; 

 e, under side of a larval segment. After Riley. 



found on plants.. While the Phengodini are phosphorescent, 

 tribe Lampyrim embraces the fire-flies, which have phos 

 phorescent organs at the end of the abdomen. In the 

 species of Pliotvris both sexes are winged, but in Lampyris 

 the female's, called glow-worms, are larva-like and wing- 

 less? The larvae are 'often carnivorous, living on snails, 

 worms, etc. . The females of Phengodes and Zarhipis are 

 not easily distinguishable from the larvae, and are phos- 

 phores<fent (Fig. 114),. 



Family Buprestidae. Skin very thick and solid; antenna? 

 serrate; tarsi with membranous lobes as in the Cleridoe. 

 Lame with a large, broad prothoracic segment, body be- 

 hind slender, cylindrical; living under bark. This group 

 is numerous in species, about 2700 being known. They 

 usually Cave metallic reflections and often rich colors; but 

 are very injurious to fruit and shade trees (pines, oaks, 

 etc.). Chrysobothris fen/orata Oliv. is a common and de- 

 structive species; in Dicerca the tips of the elytra separate. 

 Chalcophora mrginiemis Drury bores into the trunks of 

 pines. Melanophila drummondi (Kirby). 



Family Throscidae. Resembling the next family, but 

 with the prothornx fixed so as to be enabled to leap. Thros- 

 cus constrictor Say. 



the 



~ 



D 



FIG. 114. 

 Female 

 (or larva?) 

 of Phen- 

 godes. 



FIG. 115. Chrysobothris femo- 

 ra fa and larva. 



FIG. 116. Drummond's 

 Melanophila. 



Family Elateridae. Prothorax loosely articulated, the prosternum 

 prolonged behind, forming a sharp spine which moves in a cavity 

 in the mesosternum, so as to suddenly throw the beetle in the air 



