282 Mr. F. Bates's descriptions of 



in front of the eyes; less squarely truncated in front, 

 antennary orbits less convex, more rounded, and epistomal 

 suture less strongly marked than in the two preceding 

 species; prothorax very convex; slightly curvedly nar- 

 rowed from behind the middle to the apex ; base scarcely 

 wider than apex, broadly roimded; fi'ont angles indistinct; 

 latei'al margins well marked ; elytra not produced nor 

 divaricate at apex, very finely seriate-punctate, of a more 

 shining black than the head and prothorax ; base arcuately 

 emarginate; keeled only halfway across each elytron; 

 humeral angle prominent and acute; sides not channelled 

 near the base; abdomen shining black; episternum of 

 mesothorax coarsely punctured; prosternum broad and 

 impressed between the coxte; legs and first 7 joints of 

 antenniB shining pitchy-brown ; joints 3 — 7 of antennae 

 obconic, not perfoliate; legs very stout, the tibiae strongly 

 thickened at the apex; anterior femora with a short to- 

 mentose line down their inner face. 



? . Antennae and legs less robust ; the former scarcely 

 so long as in the $\ the tibias not perceptibly thickened 

 at the apex; the front femora without toraentose line 

 down the inner face. 



Long. 1\ — 8 lin. 



Fianarantsoa. 



Var. ? tumidicoUis. 



This only differs in the larger, more tumid, and cushion- 

 like prothorax; the stronger punctuation of the under 

 surface; the prosternum not impressed between the coxte; 

 the femora rather strongly wrinkled on their underside ; 

 and the legs and antennae of a more pitchy hue. 



Long. 8— 8| lin. 



Fianarantsoa. 



I have only seen the $ . 



Dolichoderus longicornis, Fairmaire. 

 Bull. Ent. Soc. de France, 1875, p. xxxiv. 



Body entirely shining silky black; legs and antennfe 

 shining pitchy-brown; head as in D. lucifugus, but the 

 punctuation a little more distinct ; prothorax rather 

 strongly convex, but little narrowed anteriorly, base 

 scarcely wider than apex ; lateral margins visible only 

 at base and apex; front angles small, subobtuse; base 

 broadly rounded ; finely and clearly but not closely punc- 



