266 INSECTS. COLEOPTEEA. 



R. mystacimis, Lat. Blackish, with white points formed by hairs 

 on the thorax and elytra ; coxee yellow, with the exception of the 

 knees ; antennae black ; elytra with three longitudinal ribs on 

 each. Drury, ii. pi. 48, fig. 7. 



Gen. DASCILLUS, Lat Atopa, Fab. 



Mandibles discovered ; antennae simple ; last joint of the palpi 

 truncated or very obtuse ; body oval ; last joint of the tarsi 

 bilobed. 



D. cervinus, Lat. Body black, with a cinereous down ; antennae, 

 elytra, and feet pale red. Europe. Lat. Gen. i. pi. J, fig. 11. 



Gen. ELODES, Lat. Cyphon, Fab. 



Mandibles partly concealed under the labrum ; maxillary palpi 

 pointed, the labial forked ; antennae simple, of eleven joints ; 

 penult joint of the tarsi bilobed ; body hemispherical or short 

 oval. 



E. grisetis, Lat. Body black, with the elytra and feet reddish. 

 Lat. Nouv. Diet. x. 179. 



Gen. SCIRTES, Illig. Cyphon^ Fab. 



Posterior legs formed for leaping ; coxae very thick, and the legs 

 terminated by a long spine. 



S. kemispherica, Lat. Black, orbicular, pubescent, with the base 

 of the antennae and legs pale. Inhabits Europe, on aquatic plants. 

 Lat. Hist. viii. 391. 



TRIBE IV. LAMPYRIDES. 



Body straight, soft ; thorax flattened, semicircular or square, 

 advanced over the head; maxillary palpi thickest towards their 

 extremity ; mandibles small, depressed, pointed and entire, or 

 unidentated in the internal side ; penult joint of the tarsi bi- 

 lobed. 



This tribe of insects, except the first two genera, are nocturnal. When seized 

 they fold their antennae and their feet against the body, and appear as if dead. Some 

 have the antennae approximated at their base, and the head advanced ; while in 

 others this part is almost entirely concealed by the thorax. The females of some 

 species are apterous, or have the elytra very short ; and the posterior extremity of 

 the abdomen in many is phosphorescent. 



I. Antennae approximated at their base ; mouth small ; head of some advanced in 

 the form of a rostrum ; that of others concealed entirely or in the greater part by 

 the thorax, -with the eyes large in the males ; posterior extremity of the abdomen 

 phosphorescent in many. 



Gen. LYCUS, OMALISUS, PHENGODES, AMYDETES, LAMPYRUS. 



II. Antennae separated at their base by a marked space ; head not projecting like a 

 rostrum, obtuse or rounded before, simply covered at the base, with the mouth 

 and eyes of ordinary size. 



Gen. DRILUS, TELEPHOROUS, MALTHINUS. 



Gen. LYCUS, Fab. Lampyiris, Lin. 



Head prolonged into a snout ; antennae compressed ; elytra wid- 

 ening towards their extremity in some exotic species and in 



