126 HYMENOPTEEA. 



thick tuft of white hair ; the legs are covered with a sparse white glistening pubescence ; 

 and the underside of the abdomen at the apex is sparsely covered with moderately 

 long black hairs. In front of the scutellum is a deep transverse furrow. The meso- 

 thorax is distinctly margined in front (the margin extending to the middle) ; roundly 

 angled in front, and wider than the prothorax. The mesonotum bears no sutures in 

 front of the scutellum, except an almost obsolete hollow on either side in front. The 

 scape at the base and apex is black. The middle and posterior trochanters, the 

 apices of the posterior coxae, and the mark on the middle of the intermediate tibiae 

 beneath are testaceous. The breast in front of the middle legs is dirty testaceous, but 

 I am not certain if this is natural. All the calcaria are black ; the fore knees are only 

 slightly white. The fore wings are subhyaline at the base ; in front of the cubitus is a 

 curved, narrow, hyaline band, and opposite this is a broader and shorter band; the 

 apices are almost bare, and lighter coloured than the middle. The hind wings at the 

 base bear a few long feather-like hairs ; the apices shortly fringed. Ovipositor short, 

 thick, testaceous. The scape may be entirely black or testaceous; and the number and 

 position of the testaceous joints of the nagellum vary — sometimes it is the eighth to 

 tenth, in other specimens the fourth to sixth. 



2. Lutnes dromedarius. 



Niger ; tarsis anterioribus terebraque testaceis, geniculis trocbanteribusque posterioribus albidis ; alis fuscis, 



albo fasciatis. 

 Long. 5-6 millim., terebra 1 \ millim. 



Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 



Antennae of the length of the abdomen, thick, clavate at the apex, the last joint 

 obliquely truncated, the joints not clearly separated, covered with a close, white down. 

 Head, thorax, and apex of the abdomen alutaceous ; rest of abdomen smooth, shining, 

 glabrous ; apex of the abdomen, head, and thorax covered with a close, white down ; 

 mesopleura scarcely pilose; apex of abdomen on lower side covered with long white 

 hair ; the pronotum carries a tuft of long black hairs ; legs covered with a microscopic 

 pile. At the commencement of the ulna (but not touching it) is a curved band pro- 

 ceeding in the direction of the apex of the wing ; at the cubitus is a broader and shorter 

 cloud proceeding in the direction of the first. 



3. Lutnes crassicornis. (Tab. VI. fig. 15, $ .) 



Niger; tarsis anticis terebraque testaceis, femoribus posterioribus basi, eoxarum posticis apice geniculisque 



posterioribus albis ; alis f'umatis, albo maculatis. 

 Long. 6 millim., terebra fere 2 millim. 



Hab. Panama, Volcan de Chiriqui 3000 to 4000 feet (Champion). 



The antennae, head, thorax, sides, and apex of abdomen are covered with a white 

 pubescence, which is longest on the apex of the abdomen ; the apex of the antennae 



