1917.] NATURAL SCIENCES OF PHILADELPHIA. 249 



or great variation occurs in the species in this usually constant 

 feature. The present specimen has the tegminal shoulders rather 

 sharply rounded, but a lateral keel is subobsolete and the tegmina 

 should best be termed not keeled. 



As noted above, the genus agrees with Litocosmia, alone of the 

 genera of the Ancistrogastrinse, in having a simple penultimate ven- 

 tral abdominal segment in the male, but in the specialization of the 

 dorsal abdominal segments shows much closer affinity to the Ancis- 

 trogaster type, being nearest Praos in this respect, before which 

 genus, in linear arrangement, we would place Osteidcus. The forceps 

 are distinctive and remarkable. 



OPISTHOCOSMIINiE. 



Kleter aterrimus (Bormans). 



1883. A[ncistrogaster] aierrimus Bormans, Ann. Soc. Ent. Belg., XXVII, 

 p. 83, PI. Ill, fig. 18. [Ecuador.] 



Rio Charape, Peru, IX, 14, 1911, (C. H. T. Townsend), Id", [U. S. N. M.j. 



This specimen is very slightly larger than the type, with the 

 description of which it agrees throughout. The figure is exceedingly 

 crude. 



Except for the much broader last dorsal abdominal segment, a 

 general superficial resemblance to the species of Skalistes is shown. 



Eparchus burri (Bormans). 



1903. Opisthocosmia burri Bormans, in Burr, Ann. Mag. Nat. Hist., (7), 

 XI, p. 267. [Lompa Battau, South Celebes, at 3000 meters.] 



Bua-Kraeng, South Celebes, 5000 meters, II, 1896, (for H. Fruhstorfer), Icf , 

 [Hebard Chi.]. 



The original description is very brief; valuable comparisons are 



later made by Burr.-' 



Explanation of Plate XVI. 



Fig. 1. — Forcipula despinosa new species. d', type. Northern India. 



Dorsal outhne. (X 2.16). 

 Fig. 2. — Pseudisolabis elegans new species, d, type. Kulu, Kangra, India. 



Dorsal outline. (X 4). 

 Fig. 3. — Pseudisolabis elegans new species. 9 , allotype. Kuki, Kangra, 



India. Dorsal outhne of ultimate dorsal abdominal segment and forceps. 



(X 10). 

 Fig. 4. — Labia barberi new species, cf , type. Cacao, Trece Aguas, Alta 



Vera Paz, Guatemala. Dorsal outhne. (X 14). 

 Fig. 5. — Labia nodifer new species, cf , type. Cacao, Trece Aguas, Alta 



Vera Paz, Guatemala. Dorsal outhne. (X 13). 

 Fig. 6. — Labia arcuata Scudder. cf , type. Vassouras, ISIinas Geraes, 



Brazil. Dorsal view of distal dorsal abdominal segments and forceps. 



(X 7.7). 



^^ Fauna British India, Dermapt., p. 194, (1910). 



