Capt. P. P. King's South American Coleoptera. 449 



been included in the genus Brachygaster, but their structure is so different in 

 some respects, that the cliaracters laid down will not embrace them. Brachy- 

 gaster is at once distinguished by the outer claws of all the tarsi being bifid in 

 both sexes, and the posterior tarsi compressed and thickened, especially the 

 basal joint. In CaUichloris the claws are simple, and in Tribostethcs, in which 

 they are the same, the joints of all the tarsi are more or less elongated ; even 

 in the anterior they are not transverse, and the 5th joint is not notched ; the 

 club also of the antennae is exceedingly elongated in the males. 



/ 



,*78. Brachystemus prasinus, Gudr. Voyage de la Coquille, pi. 3. f 4. 



The clypeus of the female is entirely rusty-brown ; in the male the margin only is of that 

 colour. 



It was abundant in Chiloe, and has often been confounded with the follow- 

 ing species. 



Callichloris, Dejean. 



Palporum maxillarium artlculus penultimus minutus, subglobosus ; terminalis crassior, lon- 

 gior, subfusiformis, extus planus. Antennae 10-articulatae, articulus basalis crassus, 

 pyriformis, 2dus subglobosus, 3tius 4tusque oblongi, 5tus brevis, 6tus cyathiformis, 

 7mus cuneiformis, reliqui clavam gracilem fusiformem efformantes. Labrum trans- 

 versum, medio paulum angulatum. Clypeus transverse ovalis, margine fortiter reflexo. 

 Femora gracilia ; tibiae anticae versus apieem angustatae, extus tridentatae, reliquae sub- 

 scabrae, apice pectinatae calcaribusque 2 brevibus armatae ; tarsi anteriores articulis 4 

 basalibus brevibus, 3tio 4toque cyathiformibus, 5to omnium intus emarginato ; ungue 

 longo, gracih, simplici, anteriore maxime inaequali. Sternum baud productum. 



79. Callichloris perelegans, Curt. 



Pulchr^ flavo-virens punctatissima, elytris punctato-striatis, subtils pygidio- 

 que ferrugineis, anticfe pilis albidis villosis postic^ pubescentia concolori 

 vestita. 



Length 7 lines, breadth 4. 



Of a beautiful but dead pea-green, with a slight yellow or golden reflexion on the sides, but 

 not polished : antennae ferruginous : head and thorax exceedingly thickly and finely 

 punctured, the latter narrowed anteriorly, the base convex, with a broad lock of whitish 

 hairs from beneath, broader than the scutel : down the back is a distinct but not deep 

 channel : scutel subtrigonate, thickly punctured : elytra a little broadest behind, irregu- 



3 n2 , 



