242 MANDIBULATA. — COLEOPTERA. 



Elongate : black, tinged with brassy, and very finely granulated : head and 

 thorax slightly punctate, the latter with a transverse impression before and 

 another more obsolete behind the middle : elytra unequal at the base, with 

 several irregular punctate striae, and an obscure longitudinal impression on 

 the disc. 



This remarkable, though minute, insect has been very frequently- 

 captured in the broom field near the gravel-pit at Coombe-wood, 

 in the spring, within these few years ; and it has also occurred in 

 other places, but sparingly. " Southend." — Rev. F. W. Hope. 

 " Bath, by Dr. Da vies; and Kingsbridge, Devonshire, by J. 

 Cranch." — Dr. Leach. " Grassy places, Coombe-wood." — Messrs. 

 Ingall, Ingpen, and Westwood. 



Genus CCXVII. — Trachys, Fabricius. 



Antennas short, with the two basal joints robust; the four following slender, equal, 

 subovate ; the four next produced on the inner edge, the terminal one obliquely 

 ovate. Labrum transverse, obscurely emarginate : palpi very short, equal : 

 head broad, emarginate: thorax transverse, sinuated behind: elytra broad, 

 nearly triangular, attenuated to the apex : scutellum minute : body short, ob- 

 tuse anteriorly, attenuated behind, depressed : legs slender ; tarsi with dilated 

 joints, the terminal joint with two claws. 



Trachys may be at once known from the other Buprestidse by 

 the width and brevity of the body, which is greatly depressed, the 

 robustness of the two basal joints of the antennae, which are very 

 short, and have the apical half above serrated, somewhat as in 

 Aphanisticus, the palpi very short, labrum transverse, &c. 



Sp. 1. pygmaea. Capite thoraceque Iwvibus aeneis, elytris caeruleis aqualibus rude 

 punctatis, corpore nigro-ameo, fronte excavato. (Long. corp. 1^ lin.) 



Tr. pygmaea. Fabricius.— Steph. Catal. 120. No. 1222.— Bu. pygmaea. Don. 

 viii. pi. 282. 



Head and thorax brilliant glossy-copper, impunctate : forehead excavated : elytra 

 of a rich blue, rudely punctate, the punctures somewhat disposed in striae to- 

 wards the suture : body beneath black-brass, a little glossy and finely rugose : 

 legs and antennae aeneous. 



Very rare in Britain : three or four examples only have as yet 

 occurred, and of these two in the neighbourhood of Coombe-wood. 

 " Cambridge." — C. Darwin, Esq. 



