SMITH ON HYMEKOPTERA OE AEU ISLANDS. 149 



fulvo ; capite thoraceque carinis irregularibus ; metatliorace spinis 

 duabus longis armato. 



Worker. Length H lines. Head and abdomen black, with more or 

 less of an obscure ferruginous tinge, particularly at the vertex and 

 base of the abdomen; the thorax and nodes of the petiole ferru- 

 ginous; the legs rufo-piceous, with the tarsi and articulations fer- 

 ruginous, the antennae and mandibles ferruginous ; the head and 

 thorax with irregular distant longitudinal carina?; the sides of the 

 thorax rugose; the spines on the metathorax long and acute; the 

 abdomen very smooth and shining ; the club of the antennse 3-jointed. 



Hab, Aru. 



Gen. Crematogastee, Zund. 



1. Crematogaster obscura. Smith, Cat. Hym. Ins., Journ. Proc. Linn. 

 Soc. ii. 76. 4 ^ . 



Hab. Aru; Borneo. 



2. Crematogaster elegans. C. pallide rufo-testaceus ; abdomine 

 nigerrimo nitido ; thorace bispinoso. 



Worker. Length f line. Entirely pale rufo-testaceous, excepting the 

 eyes and abdomen which are jet black ; the nodes of the petiole pale, 

 smooth, and shining. Head about the same width as the abdo- 

 men. The lateral angles of the anterior margin of the prothorax 

 acute, the metathorax armed with two long acute spines. Abdomen 

 heart-shaped, its apex acute. 



Hab. Aru. 



3. Crematogaster insularis. C. niger, Isevis et nitidus; antennis 

 tarsisque pallide testaceis ; thorace spinis duabus acutis armato. 



Worker. Length 1| line. Black, smooth and shining; the vertex, 

 thorax and nodes of the peduncle with an obscure ferruginous tinge ; 

 the antennae, tarsi, and articulations of the legs pale rufo-testaceous ; 

 the spines which arm the metathorax stout, elongate, and acute, with 

 their apex pale testaceous. Abdomen heart-shaped and very acute at 

 the apex. 



Hab. Aru. 



Gen. SoLENOPSis, Westw. 



1. SoLENOPSis CEPHALOTES. S. pallide fcrruginca J capite maxime 

 in medio sulcato, abdomine apice fusco. 



Worker major. Length 2^ lines. Pale ferruginous, with the anterior 

 part of the face darker, the mandibles incrassate and very dark fusco- 

 ferruginous; head very large and divided by a deep longitudinal 

 channel, emarginate behind, nearly quadrate; the eyes small and 

 placed forwards on the sides of the head. The metathorax truncate, 

 not spined. Abdomen ovate, truncate at the base, its apex fuscous ; 

 the first node of the petiole compressed, its margin rounded above. 



