of a new Genus of Coleopterous Insects. 93 



the structure of the mouth and wings, and the large convex elytra 

 entirely covering the abdomen (closely resembling the genus Lema 

 in tliis respect), entirely removing it from Paussi. With Claviger, 

 also (to which it bears some slight relation in the structure of its 

 few-jointed antennas, truncated at the tip), it possesses still less 

 affinity. Its nearest allies, on the other hand, appear to me to be 

 found amongst some of those Xylophaga of Latreille which pos- 

 sess five-jointed tarsi, but with none of these groups does it bear 

 a very close relationship, even if we regard the antennae as an ano- 

 malous aberration.* D'ltoma, Colohicus, Synchiln, Cicones, Aido- 

 nium, Colydium, Teredus, and one or two allied genera, are at once 

 separated from it by their four-jointed tarsi, and by the leathery 

 patch on the lower margin of the wing beyond the middle, and by 

 the veinless apical portion scarcely occupying more than one-third 

 of the length of the wing. Cerylon, also, in its four-jointed tarsi and 

 subulate palpi, is removed from Gnostus. Anoniviatus, also, which 

 has a glossy castaneo-rufous body, and is a terrestrial insect, has 

 bilobed maxillae, four-jointed tarsi, &c. Some of the Cucitjidt^ 

 have, it is true, five-jointed tarsi, and the apical veinless portion 

 of the wing is of very great extent, but their maxillae are bilobed, 

 and the palpi of ordinary form. With Latridius and Holoparo- 

 meciis, as well as with the minute insects belonging to the Corylo- 

 p/iidce,-f there appears to be some slight relation in the comparative 

 want of development of the maxillary appendages, but the struc- 



* In addition to the great number of species of Brachelytra found in ants' 

 nests, the following genera of the Xylophaga of Latreille have also been found to 

 possess Formieicolous habits : — 



Cholovocerti formicaria, Motschoulsky, Bull. Mosc. 1838, 177; Markel, Zeitsch. 



fUr Ent. V. 255. 

 Latridius formicetorum aiXidfusculus, Mannerheim, Bull. Mosc. 1843. 

 Latridius eloiigatus, Markel, Zeitsch. fiir Ent. v. 253. 

 Hupocopr us formicetorum, Motschoulsky, Bull. Mosc. 1839, 72. 

 Cryptophagus glaber, Gyllenhal, Markel, Zeitsch. fiir Ent. iii. 218. 

 Cryptopliagtts (4 species), Markel, Zeitsch. fiir Ent. v. 244. 

 Trichopteryx (1 species), Markel, id. 

 Corticaria (4 species), Markel, id. 252. 

 Synchita Juglandis, Markel, 1. c. 

 Cerylon (2 species), Markel, I. c. 

 Rhizophagus (2 species), Markel, 1. c. 



Mnnotoma angusticolle and conicolle, Aube, Ann. Soc. Ent. France, vi. 

 Myrmechixenns sublerraueus, Chevrolat, Rev. Silberm. iii. 263, and Markel, 



o. c. V. 253. As well as 

 Scydm(€iuts (9 species), Markel, o. c. v. 242 ; and several species of minute 



Hislerid<e, 

 ■f Details of several of these genera will be found in the lower part of the 10th 

 plate in Mr. WoUaston's Insecta Maderensia. 



