76 Mr. F. Smith on some new Genera and Sjieeies 



3. Cvyptocerns placidus. 



C. capite thoraceque uigris ; antennis, pedibus abdomineque feiTugineis ; 

 alis fiisco-liyalinis. 



3Ialc. Length 4 lines. Head black, transverse, with large shallow 

 punctures on the vertex ; the eyes large and prominent ; the scape and 

 basal joint of the flagellum black, the following joints ferruginous, and 

 gradually thickening from the basal to the apical joint. Thorax, and 

 also the coxae, black ; the mesothorax with large shallow punctm-es ; 

 the metathorax rugose above, truncate posteriorly, deeply emarginate 

 behind, forming teeth at the lateral angles ; the legs ferruginous ; the 

 Avings fusco-hyaline, ■s\'ith the first submarginal cell clear hyaline. Ab- 

 domen ferruginous, with the nodes of the peduncle black ; each node 

 with a minute tooth at the sides. 



Hub. St. Paul (Brazil). 



4. Cryptocerm laminatus. (Plate lY. fig. 3.) 



C. niger ; antennis tibiisque subferrugineis ; capite ante et pone oculos, 

 abdominisque basi lamina pellucida instructis. 



Worker. Length 2-21 lines. Black, and sprinkled over with silvery- 

 white glittering setse ; the sides of the head, before the eyes, broadly 

 pale testaceous yellow ; the eyes prominent, situated at the posterior 

 angles of the head, which has the margin curved behind the eyes and 

 emarginate in the middle ; the antennee pale beneath and fuscous above. 

 The thorax with five pale spines on each side, the posterior pair longest ; 

 a deep strangulation at the base of the metathorax ; the tips of the fe- 

 mora, the tibige, and apical joints of the tarsi pale ferruginous, the tibiae 

 with a dai'k stain beneath. The abdomen subcordate, the margins at 

 the base pale and membranaceous ; the nodes of the pediuicle trans- 

 verse ; the anterior one subquadrate, with a pale acute spine on each side 

 curved backwards towards the abdomen ; the second node somewhat 

 cup-shaped, terminating laterally in a pale acute spine, which is di- 

 rected outwards. 



Captured by Mr. H. W. Bates at Ega, Brazil. In the Collection of 

 the British Museum. 



5. Cryptocerus grandinosus. (Plate lY. fig. 5.) 



C. ochraceus, supra squamis albis pellucidis transversis tectus ; capite an- 

 tice, thoracis lateribus, abdominisque nodis et basi glacie quasi mar- 

 ginatis. 



Worker. Length 1| line. Ochraceous ; the head subquadi'ate, 

 rather longer than broad ; the sides before the eyes broadly pale luteo- 

 testaceous, and the posterior margin laterally narrowly so ; the eyes 

 black, and the flagellum rufo-testaceous. Thorax : the anterior angles 

 acute ; the sides margined with a glassy- white, subtransparent mem- 

 brane. The abdomen o^•ate, and emarginate at its base ; the nodes of 



