LAMPYRlDiE. — LAMPYRIS. 289 



Genus CCXXXVL— Drilus, Olivier. 



Antennae rather stout, pectinated internally in the males, the second joint small, 

 rounded ; simple in the females. Palpi unequal, the maxillary elongate, with 

 the terminal joint acute, the labial short, subcylindric : maxilla; not bilobed : 

 mandibles emarginate at the apex : labium ohsoletely emarginated ; head short, 

 exserted, almost as broad as the thorax, which is somewhat transverse, broader 

 behind than in front : body elongate, arched : elytra flexible : female apterous. 



As before stated, the location of tins genus is objectionable ; but 

 as the habits of the larvae closely resemble those of the true Lampy- 

 rides, doubtless its situation must be near them, from which the only 

 known species may be distinguished by its transverse thorax, which 

 is narrowed in front, the deeply pectinated antennae, exserted head, 

 and emarginate mandibles. 



The larva resembles that of a glow-worm, but the sides of the 

 abdomen are furnished with a series of conical fleshy lobes, and its 

 back with two rows of hairy fascicles; the extremity of the body is 

 forked, and the anal lobe is employed as a seventh leg : it feeds 

 voraciously upon the Helix aspersa. 



Sp. 1. flavescens. Niger, pubescens, elytris Jlavescentibus. (Long. corp. $ 



1\— 2>\ lin. : $ 8— 10?lin.) 

 Dasytes flavescens. Olivier— Steph. Catal. 137. No. 1397. 

 Black, covered with a rich griseous pubescence : elytra flavescent, very soft and 



flexible, also clothed with a griseous pile. Female apterous, subcylindric, 



rather narrower in front, fleshy, yellowish orange, with two darker patches on 



the upper side of each segment of the body. 



Not very uncommon in June, on high grass in the lanes about 

 Darenth-wood ; also taken near Gravesend, and I found two spe- 

 cimens at Dover, in June, 1819 : at different periods I have captured 

 nearly fifty specimens of the male, but the female — which is the 

 Cochleoctonus vorax of Mielzinski — I have never beheld, though 

 the sexes have been found in copula at Darenth by a gentleman 

 residing at or near Gravesend. 



Genus CCXXXVII. — Lampyris Auctorum. 



Antenna; short, the articulations short, cylindric, compressed ; the third as long 

 as the following ; the second small, the terminal one elongate, acute. Palpi, 

 maxillary with the last joint trigonal ovate, compressed, acute at the apex: 

 labial short. Head concealed beneath the anterior margin of the thorax, 

 which is semicircular (in the indigenous species) : eyes large : body soft, oblong- 

 oval, much depressed : abdomen serrated on the lateral margin: elytra coria- 



