30 HYMENOPTERA. 



tlina in having the scale or node of the ahdomen rather longer, 

 and in its being elevated anteriorly. The worker of F. virescens 

 has the head more convex behind the eyes than in F. snmragdina, 

 and the petiole of the abdomen is shorter, and of a somewhat 

 different form. 



The male of F. virescens is 3 lines in length, of a pale 

 rufo-testaceous colom-, varying in depth in different specimens, 

 and is covered with short "thin pale pnbescence ; the head with 

 the vertex subquadrate, slightly narrowed posteriorly, with the 

 angles rounded ; the eyes larger than in the female ; the first 

 joint of the flagellum clavate, nearly as long as the two follow- 

 ing, the rest being subovate and of nearly equal length. Thorax 

 subovate, narrowed posteriorly ; the wings ample, hyaline, with 

 the nervures ferruginous. The legs very slender and elongate. 

 Abdomen rounded, the petiole narrowed at the base. 



Hab. Africa; Australia. 



98. Formica cruentata. 



Formica cruentata, Latr. Hist. Nat. Fourm. 116. pi. 3. f. 10 ^ . 

 Formica pilosa. Oliv. Enci/cl. Meth. v. 498. 39? 

 De Geer, Ins. vii. 612. pi. 45. f. 13, 14 ? 



Hab. Africa? 



This species very closely resembles, if indeed it be not iden- 

 tical with, the F. opaca of Nylauder. 



99. Formica obtusa. B.M. 

 Worker. Length 5 lines. — Head and thorax anteriorly ob- 

 scure red, otherwise black and shining ; the flagellum and base 

 of the scape ferruginous. Head very large, much wider than 

 the thorax ; the ocelli very minute and distinct. Thorax rounded 

 in front, truncate behind, and gradually narrowed and com- 

 pressed, being somewhat wedge-shaped ; divided above by two 

 transverse sutures. Abdomen ovate, covered with pale golden 

 pubescence ; the node of the peduncle incrassate, above emar- 

 ginate. 



Hab. Egypt. 



This species is remarkable for its short broad appearance, and 

 for having the ocelli distinct ; in the tyiie-specimen the greater 

 portion of the pubescence is rubbed off. 



100. Formica micans. 



Formica micans, A'y/. Fownn. Fr.etd'Alg.Ann. Sc. Nat. v. 55. 4 ^ . 

 Hab. Algeria. 



