ART. 9 WEST INDIAN BUPRESTIDAE FISHER 177 



Genus TRACHYS Fabricius =° 



Trachys Fabricius, Syst. Eleuth., vol. 2, 1801, p. 218-220. — Eschscholtz, 

 Zool. Atlas, vol. 1, 1829, p. 9 (reprint, p. 8). — Solier, Ann. Soc. Ent. 

 France, vol. 2, 1833, pp. 311-312, pi. 12, fig. 30.— Castei-nau and 

 Gory, Mon. Bupr., vol. 2, 1840, pp. 1-11, pis. 1-2. — Lacordaire, Gen. 

 Col., vol. 4, 1857, p. 88. — Kerremans, Wytsman's Gen. Insectorum, 

 fasc. 12, pt. 4, 1903, pp. 307-314. 



Head rather convex, wide, and more or less grooved or concave, 

 and strongly narrowed by the antennal cavities; epistoma con- 

 stricted posteriorly by the antennal cavities, and emarginate in 

 front; antennal cavities rather large, oblique, rounded behind, pro- 

 longed into a groove in front, and situated a short distance from 

 the eyes. Antennae 11- jointed, the basal joints inserted in a groove 

 between the eyes and epistoma, the groove not prolonged on the 

 prosternum, the apical joints free while in repose; first and second 

 joints thick; third to sixth slender, cylindrical; the following joints 

 triangular, dentate on the inner margin, and armed with terminal 

 poriferous foveae. Eyes large, oval, sometimes projecting, and more 

 widely separated on occiput than in front. Pronotum much wider 

 than long, narrower in front than behind ; anterior margin arcuately 

 emarginate, with the apical angles acute ; sides narrowed anteriorly ; 

 base strongly bisinuate. Scutellum very small or invisible. Elytra 

 broad, attenuate posteriorly, and rounded at apex; humeri promi- 

 nent and sometimes extending into a longitudinal carina along the 

 lateral margin and at some distance from it. Sternal cavity formed 

 by the mesosternum and metasternum, the lateral branches of the 

 former short and very indistinct. Metasternum feebly, arcuately 

 emarginate in front. Prosternum short, wide, rounded at apex, 

 and the anterior margin armed with a more or less broad lobe. 

 Middle coxae a little more widely separated than the anterior ones; 

 posterior ones usually dilated externally. Legs slightly robust and 

 not lodged in depressions beneath; femora rather thick; tibiae 

 slender, straight or feebly arcuate, and in repose not concealed in 

 grooves in the femora; tarsi very short, the joints enlarged and 

 lobed, the first joint longer than the following ; tarsal claws strongly 

 toothed at base. Body short, suboval, or pentagonal. 



This genus contains a large number of very small leaf-mining 

 forms. It is distributed throughout the entire world with the ex- 

 ception of the Nearctic Region. The species of the genus reach their 

 highest development in the Indo-Malaysian Eegion, but a few spe- 



^ Since submitting this article for publication there has appeared an article by Dr 

 Jan Obenberger (Sbomlk Entomologick^ho OddglenI NSrodnlho Musea v Praze, vol. 1. 

 1923, p. 41), in which he places Litis guadeloupensis Fleutiaux and Sall6 in his new 

 genus Neotrachys. 



