new species of Cryptoceridce. 609 



In the British Museum, from the collection of Mr. 

 H. W. Bates. 



The large worker of this species was described and 

 figured in the second volume of the Transactions of this 

 Society, PI. XX. fig. 2. Mr. Bates subsequently sent 

 specimens of both the sized workers, obtained from the 

 nest; the small worker has a differently shaped head to 

 the larger Avorker ; the head is nearly flat above, slightly 

 convex, punctured, Avith the margins pale reddish-brown, 

 widest in the middle. The thorax is differently shaped 

 anteriorly, not being obliquely inclined to the head ; the 

 abdomen and nodes of the ]Deduncle are the same in form 

 as in the larger worker. The male and the large and 

 small Avorker are figured in the Catalogue of Formicida?, 

 ])ublished by the trustees of the British Museum,_Part VI. 

 ri. XI. fig. 1, ^; 2, Avorker major, 3, Avorker minor. 



Genus Meranoplus, Smith. 

 1. Meranoplus mtrudens. 



Female. — Length 3 lines. Opaque-black; the scape 

 of the antennas, the base and apex of the flagellum, tips 

 of the femora, the tibias, the anterior tarsi, and the apical 

 joints of the intermediate and posterior pairs, light ferrii- 

 ginous; the Avings flavo-hyaline, the nervures pale rufo- 

 testaceous. Head, thorax and nodes of the peduncle Avith 

 rugose confluent punctures ; the head longer than broad, 

 slightly narroAved before the eyes; the posterior margin 

 of the A-ertex broadly emarginate. The anterior margin of 

 the prothorax arched; the thorax about the same length 

 as the head, narrowed behind the insertion of the Aviugs ; 

 the metathorax Avith tAvo blunt spines. Abdomen oblong 

 and A^ery finely shagreened ; emarginate at the base and 

 rounded at the apex. 



Worker. — Only differs from the female in being rather 

 shorter, and in the form of the thorax, as Avill be seen by 

 the figure; the abdomen shorter, Avith the sides less parallel. 



Male. — Length 21 lines. The colour and sculpture as 

 in the female. Head Avider than the thorax, much nar- 

 roAved before the eyes ; the lateral angles of the posterior 

 margin of the vertex subspinose. Thorax anteriorly 

 arched; the mesothorax Avith tAvo curved, deep, broad 

 channels that curve iuAvardly and unite at the base of the 

 scutellum; the scutellum, the spines of the metathorax, 

 and tiie nodes of the peduncle of the abdomen, grooved 



