HYMENOPTKRA. -i/ 



91. Formica placida. 



Female. Length 6 lines. — Head, antenna;, thorax, legs and 

 scale of the peduncle, ferruginous ; the legs and thorax beneath 

 jialest ; abdomen brown-black, smooth and shining ; the head 

 scarcely wider than the thorax, both slightly sinning; wings 

 subhyaline, the nervures pale testaceous ; scale of the peduncle 

 ovate, with a deep notch above. Abdomen ovate and impunctate. 



Hab. Java. (Coll. East India House.) 



92. Formica trif.\sciata. 



Female. Length 4 lines. — Ochraceous, with three fuscous 

 stripes on the thorax, the central one abbreviated ; the abdomen 

 fuscous, with the apical margins of the segments ochraceous ; 

 the node of the peduncle incrassate, oblong, narrowed and slightly 

 notched at the apex above ; the tibiae and tarsi paler than the 

 femora ; wings fusco-hyaline, the first submarginal cell elongate, 

 of nearly equal width throughout, very slightly widened at the 

 apex; the second submarginal cell complete, extending to the 

 apex of the wing ; the head small, much narrower than the 

 thorax, with the eyes prominent. 



Hab. Java. (Coll. East India House.) 



93. Formica singularis. 



"Worker. Length 6 lines. — Head ovate, red ; antennae slender, 

 as long as the thorax, and black ; clypeus subcarinate ; eyes 

 black and ovate. Thorax black, elongate, narrow, widest in 

 front, and narrowest in the middle ; the metathorax convex, 

 evenly rounded from base to apex ; the legs elongate ; the thorax 

 and legs covered with a tine silky ])ile, and sprinkled with a fevi- 

 long erect pale hau-s. Abdomen black, ovate, somewhat ])ointed 

 at the apex, covered with a fine silky slightly golden jiile, and 

 sprinkled with long erect pale hairs ; the scale of the peduncle 

 forming a blunt rovmded node. 



Hab. Java. 



This probably belongs to a diiferent genus, or at least to a 

 very distinct section, but, only being acquainted with one sex, 

 I leave it at present in the genus Formica ; the palpi are more 

 elongate than is usual, the joints of the antennae are much longer 

 and more slender, the insect having very much the appearance 

 of a species of Dolichoderus. 



94. Formica luctuosa. 



Female. Length 7^ lines. — Shining black : the vertex sub- 



c2 



