96 MB. smith's DESCEIPTIONS OF HTMENOPXEEOUS INSECTS 



Female. Length 3^ lines. Black, smooth and shining ; the head ob- 

 liquely truncate before the insertion of the antenna; ; the truncated 

 portion, the mandibles and head beneath, obscm'ely ferruginous ; the 

 eyes ovate, placed high on the sides of the head ; the ocelli in a 

 triangle wide apart on the vertex ; the flagellum fusco-ferruginous. 

 The thora.x oblong-ovate, the metathorax truncate, the margins of the 

 tnmcation rounded ; the legs obscure rufo-fuscous, with the tips of 

 the tarsi paler ; the wings fuscous. Abdomen ovate ; the scale of the 

 ])eduncle narrow, thickened and obtusely rounded above. 

 Worker. Length 2j Unes. Closely resembling the female, but the 

 head not shining ; ferruginous before the eyes and rugose ; the 

 antennae ferruginous, with the apex of the scape and first joint of the 

 flagellum blackish. Thorax and abdomen smooth and shining, the 

 former compressed behind ; the anterior tibiae in front and the apical 

 joints of all the tarsi rufo-testaceous. Abdomen ovate ; the scale of 

 the peduncle narrow, its superior margin rounded. 

 Hub. Bachian. 

 This species, although bearing a close resemblance to F. mutilata fi-om 



Ai'u, and also to the F. truncata of Europe, is quite distinct from both 



those species. 



9. Formica PA viDA. F. nigerrima, mandibulis tarsorumque articulo 

 apicali ferrugineis ; alis fulvo-hyalinis. 



Female. Length 4 lines. Jet black, smooth and shining ; the head 

 oblong-quadrate; the antennae fusco-ferruginous, the base of the 

 scape and of the flagellum paler ; the mandibles and anterior margin 

 of the clypeus ferruginous ; the inner edge of the mandibles with four 

 or five acute teeth. The thorax oblong-ovate ; the metathorax with 

 a central smooth longitudinal channel ; the wings fulvo-hyaline, the 

 nervures ferruginous ; the apical joints of the tarsi ferruginous. Ab- 

 domen oblong-ovate ; the scale of the peduncle incrassate and obtuse 

 above. 



Hab. Bachian. 



10. Formica familiaris. F. pallida testacea; capite thoraceque 

 postice fusco-nigris. 



Worker. Length | line. Pale testaceous, semi-transparent ; the thorax 

 at the sides, and behind, more or less dusky ; the head dark fuscous, 

 with the mandibles white. 

 Hab. Bachian. 



This minute Ant is found in houses. Mr. Wallace says that, when living, 

 its body, legs, and antennae are transparent. 



11. Formica DoRYCUS. F. nigra, elongata et gracilis ; capite postice 

 in coUum angustato; pedibus elongatis ; abdominis nodo supra acuto 



Worker. Length 6 lines. Black, smooth and shining ; head elongate, 

 widest in front, slightly narrowed towards the eyes, and abruptly so 

 behind them, forming a sort of neck ; the scape of the antennae fus- 



