44 [Febnmry. 



Isl. (C Darwin); Straits of Magellax, Punta Arenas {Belfin); 

 Chile, Chiloe and Ynche Isls. (C. Darwin). 



There are eight specimens o£ this sjDecies in the Museum, left un- 

 named by Waterhouse, seven of which were captured by Darwin. The 

 J, unknown to Chaudoir (18G1), has joints 1-4 of the anterior tarsi 

 dilated, 2 being wider than the others, as in the same sex of Brachycoelus 

 virescens G. R. Waterh. {chponti Chaud.). 



Teechus Clairv. 

 TrecTiiis hoimensis Fairm. 

 Hal). Tiekea del FuEao. Kater's Peak, Hermite Isl. (C Dancin), 

 Beagle Channel (fj/jje of Fairmaire) ; Steaits of Magellan, Punta 

 Arenas (^Michael sen). 



Found in abundance by Darwin on Hermite Island, in 1832. 



BEMBiDiOMOEPHrM, n. gen. 



Meiitum feebly bidentate in the centre in front; [ligula injured in the 

 specimen dissected] ; paraglossae slender, curved, short ; inner lobe of the 

 maxillae hooked; terminal joint of the maxillary palpi twice the length of 

 the preceding joint, conical, pointed at tip, that of labial palpi similar ; 

 antennae short ; head with a single narrow, oblique, supra-orbital furrow 

 placed close to the eyes, and a small juxta-ocular pore ; eyes large ; mandibles 

 stout, curved inwards at tip ; prothorax subcordate, sharply margined laterally ; 

 scutellum wanting : elytra oval, immarginate and truncate at base, obsoletely 

 striate on disc, the sutural stria complete, not recurved at apex, a scutellary 

 stria present, the margins not sinuate posteriorly, the epipleura rapidly nar- 

 rowed towards apex, not reaching tip ; anterior coxae separated by the 

 truncated procoss of the prosternum ; tibiae with short spurs, the excavated 

 portion of the anterior pair preceded by a similar spur : tarsi smooth, the 

 anterior pair simple, similar in the two sexes, set with short setae beneath ; 

 body convex, apterous, glabrous. 



Type, B. convexum. 



The t^'pe of this genus has the general facies of the Palaearctic 

 Denibidiiim nigricorne Gyll., except that it is larger and more convex, 

 and has a longer prothorax, approaching the Broscids and certain Ptero- 

 stichids in this respect. The simple, inferiorly setose anterior tarsi in 

 the two sexes, and the conical apical joint and compai*ativelj short second 

 joint of the maxillary palpi are its chief characters. Bemhidiomorphum 

 would perhaps be best placed near the southern Tree bids, Dormeyeria 

 Enderlein (Falklands), Oopterus Guerin (New Zealand), and Merizodus 

 Solier (Chile, Falklands, and Tierra del Fuego). Bates, in 1882, in 

 speaking of his Group *' Bipalmati," calls attention to numerous con- 

 necting links between Bemhidium, Taclii/s, and TrecJius. 



