Scudder.] 296 [April 19, 



MECOMERA. 



1839. Serv., Orth., 53: founded upon the single species brunnea 

 (from Cayenne), which is therefore the type. It has not been 

 used since, and was unknown to Dohrn. 



NANNOPYGIA. 



1863. Dohrn, Stett. Ent. Zeit., xxiv, 60: established for a new 

 species, Gerstceckeri (from Ceylon). 



NEOLOBOPHORA. 



1875. Scudd., Proc. Bost. Soc. Nat. Hist., xvn, 281 : established 

 upon a species called bogotensis (from Bogota). Another has 

 since been added from Mexico. 



OPISTHOCOSMIA. 



1865. Dohrn, Stett. Ent. Zeit., xxvi, 76: founded upon the follow- 

 ing species: (1) macuJifera (from Venezuela), spinax Dohrn, 

 luctuosus Stal, variegata (from Venezuela) ; (II) devians (from 

 Brazil), centurio (from Luzon), armata (from Sumatra), for- 

 cipata de Haan, longipes de Haan, insignis de Haan, vigilans 

 Stal, tenella de Haan, and ceylonica Motsch. The first section 

 is considered the equivalent of Stal's genus Ancistrogaster, 

 which is thus sunk beneath a new name. 

 If the group as given by Dohrn is homogeneous, the name Ancis- 

 trogaster should be preserved for it; otherwise (and we believe this 

 to be the case) Ancistrogaster (q. v.) should be retained for the spe- 

 cies of the first section, and Opisthocosmia for those of the second. 

 O. devians, however, would appear to belong rather to Ancistrogaster, 

 and this would leave the Old World species alone to Opisthocosmia, 

 of which 0. centurio may be taken as the type. 



PLATYLABIA* 



1867. Dohrn, Stett. Ent. Zeit., xxviii; 347: founded upon the fol- 

 lowing species described as new: major (from Celebes), thorac- 

 ica (from Penang and Ceylon), dimidiata (from Luzon), and 

 Guineensis (from Prince Island) — all from the tropics of the 

 Old World. 



