318 Eev. W. W. Fowler 07i new 



seriatim dispositis, apicibvis divaricatis, denticulatis ; antennis clava 

 5-articnlata ; corpore subtus aeneo, glabro, segmento ultimo abdo- 

 minis fortiter punctato ; pedibus tiavis, genibus fuscis. L. Hi xnm. 

 Narrow and elongate, shining aeneoiis ; head and prothorax 

 almost smooth, the latter much longer than broad, almost parallel- 

 sided, plainly margined, posterior angles acute, base strongly pro- 

 duced in middle, with a chstinct impressed line above produced 

 part, and a very small stria on each side ; elytra at base broader 

 than thorax, gradually contracted to apex ; apices divaricate and 

 denticulate ; rows of punctures distinct, fainter towards apex ; under 

 side aeneous, smooth; apical segment of abdomen strongly punc- 

 tured ; antennae with five-jointed club; legs yellow, knees fuscous. 



Brazil. In Mr. Crotch's collection. 



Tetralanguroides, n. g. 



The genus Tetralangmia, formed by Crotch to in- 

 clude several species of Fabricius, Wiedemann, and 

 Motschulsky from the Indo-Malayan region, is dis- 

 tinguished by its subquadrate thorax, which has the 

 anterior angles always well marked and not rounded, 

 and by its abrupt four -jointed club. Crotch enumerates 

 six described species {I.e., p. 378), and four are set 

 aside in his collection as types of new species ; as, how- 

 ever, he remarks himself, the species are very hard to 

 separate satisfactorily: he says, "Probablymost of those 

 here given will ultimately prove to be varieties of one 

 species," and, after having seen a large number of 

 specimens, I have not been able to refer any of them to 

 a distinctly separate species. Although the extreme 

 forms appear at first sight widely different, yet they are 

 connected by every gradation ; the size varies from about 

 12 to 18 mm., and some specimens are broader, with 

 the elytra more parallel-sided than others. The colour 

 variations, however, are most remarkable ; the com- 

 monest form in some districts appears to be metallic- 

 blue or green, with red head and thorax {T. elongata, 

 Fab.). The thorax, however, is often more or less 

 green, the colour forming a spot in the centre, or a band, 

 or covering the whole surface ; this appears to be 

 T. pyramidata, Wied. Specimens also occur which are 

 entirely aeneous or bright metallic-blue. 



In Mr. Crotch's collection, however, there is a speci- 

 men set aside by him as the type of a new genus, which, 



