MANUAL OF NATURAL HISTORY. 193 



50. Family. — Glow-worrns (Lampyridae). Antenna 



close together at base, filiform, serrated or 

 pectinate ; maxillary palpi slightly thickened 

 at tip, much longer than labial; mandibles 

 acute ; head small, concealed beneath front 

 of thorax ; thorax semicircular or quadrate, 

 forming a hood over head ; elytra wanting 

 in females of some species. Feign death; 

 both sexes often emit a bright interrupted 

 light, whence they are called " Fire-flies/' 



51. Family. — Sailor-Beetles (Telephoridae). An- 



tennae rather remote at base, elongate, seta- 

 ceous, rarely serrated ; maxillary palpi with 

 terminal joint ovate or hatchet-shaped ; head 

 exserted ; body very soft ; elytra long ; pe- 

 nultimate joint of tarsi bifid. Predacious ; 

 found upon Umbelliferous flowers and White- 

 thorns. 



52. Family. — Insectivorous Flower-Beetles (Me- 



lyridae). Antennae short, setaceous, sometimes 

 serrated; palpi nearly equal, sub-filiform; man- 

 dibles elongate ; head small, deeply inserted 

 in thorax ; thorax wider than head ; body 

 rather firm, elongate; tarsal joints all simple. 

 Found on flowers ; voracious, preying on 

 other insects. 



53. Family. — Cuckoo-Beetles (Cleridae). Antennae 



with the three or four terminal joints thick- 

 ened ; head inflexed, retractile within thorax 

 to the eyes ; eyes lunate ; body elongate, 

 rather soft, often cylindric ; penultimate joint 



