480 Mr. F. Siiilth's descriptions of new species 



versely striated, -witli two oblique ferruginous sutures tliat 

 meet at the scutellum, the latter suhnigose ; the hhuler 

 margni of the prothorax -with a fringe of silvery-white 

 pubescence ; the wings hyaline and iridescent, the nervures 

 blaclv, the stigma pale testaceous ; the femora and tibia3 

 ferruginous beneath, as ^vcll as the intermediate and pos- 

 terior coxai ; the postex'ior legs incrassate, their tibiw 

 being clavate; all the tarsi ferruginous. Abdomen clavate 

 and covered with silvery-grey pile, the apical margins of 

 the segments rufo-piccous, the abdomen having a tessellated 

 apijearance. 



Fanus unguiculoris. (PI. IV. fig. 8.) 



Female. — Length 5^ lines. Black, the abdomen tessel- 

 lated, with sericeous-grey pile. Very like the preceding 

 species, from which it differs in being rather larger, the 

 abdomen more elongate and much more attenuated at the 

 base ; the anterior margin of the face and clypeus not 

 ferruginous. The mesothorax not so strongly striated, 

 and the oblique sutures not at all, or very faintly ferru- 

 ginous ; the wings have the nervvu-es blacker, the stigma 

 is also darker ; the legs resemble those of the F. crossipcs, 

 but the claAvs of the posterior tarsi are long and curved, 

 being twice as long as in that species; they are ferruginous. 



The male closely resembles the female, but its legs are 

 black, the abdomen elongate and only slightly clavate ; 

 the legs are also more slender. 



MYRMICID^E. 



Tctramorium nitichim. 



Female. — Length 3^ lines. Black, smooth and shining ; 

 mandibles obscurely ferruginous ; a longitudinal impressed 

 line in front of the anterior ocellus, Avhich emits a channel 

 to the insertion of each antenna, at about half its length. 

 The thorax oblong-ovate ; the metathorax with a central, 

 longitudinal, deep sulcation, which is smooth and shining; 

 wings subhyaline and iridescent, with the nervures tes- 

 taceous. Abdomen ovate, smooth and shining ; the first 

 joint of the petiole clavate, the second subglobose. 



AVorker. — Length 2 lines. Jet black, smooth and 

 shining; mandibles ferruginous. Thorax ol)long, rounded 

 anteriorly and very convex, compressed posteriorly and 

 strangulated ; the metathorax deeply grooved posteriorly 

 and subdentate ; the tips of the femora slightly ferruginous ; 



