95 



ON THE PARASITIC HYMENOPTERA AND TENTHREDI- 

 NID.E COLLECTED BY MR. EDWARD WHYMPER 

 ON THE "GREAT ANDES OF THE EQUATOR." 



By p. Cameron. 



In the " Supplementary Appendix " to Mr. Edward Whymper's 

 'Travels amongst the Great Andes of the Equator,' 1891, I 

 descrihed the ants taken by Mr. Whymper during his memorable 

 journey in Ecuador in 1880. The parasitic species are not numer- 

 ous, being only twelve in number, but the new genera are seven. 

 They are, however, of great interest from their having been 

 taken at great elevations, most of them having been captured at 

 altitudes of from 7000 to 13,300 ft. Some of the genera re- 

 corded in the ' Travels,' p. 356, are erroneous, or are used in a 

 wider sense than they are by more recent writers. 



ICHNEUMONID^. 

 ICHNEUMONINI. 



Tyanitbs, gen. nov. 



Post-petiole widely dilated ; its width double its length dorsally- 

 ventrally ; the apex of the abdomen bluntly pointed. Median segment 

 without teeth ; the areola large, longer than wide, at the base separated 

 from the depression by a keel ; the lateral arese are not distinctly 

 separated. Apex of clypeus bluntly rounded, almost transverse. 

 Antennae as long as the abdomen, short and stout ; the basal joints of 

 the flagellum not much longer than wide. Areolet 5-angled, much 

 wider at the apex than at the base, through the cubitus having an 

 oblique slope from the base to shortly beyond the middle ; the disco- 

 cubital nervure without a stump of a nervure. Legs short and stout ; 

 the tarsi stoutly spinose on the under side. 



The head is well developed behind the eyes ; the face is flat and 

 not clearly separated from the clypeus ; the apical tooth of the 

 mandibles is long and sharply pointed ; the subapical is short and 

 blunt. The pronotum is bordered laterally by a stout keel, and there 

 is a stout keel between the two hinder cox£e. Scutellum large, flat ; 

 at the base it is as wide as its length ; it becomes narrowed gradually 

 towards the apex, and is not margined at the sides ; the post-scutellum 

 is widely bifoveate at the base. The post-petiole is flat in the middle, 

 and not much raised above the sides. The second segment is smooth ; 

 not striated at the base. There are seven abdominal segments ; the 

 last is well developed all round, and is as large as the preceding. The 

 third and fourth joints of the tarsi are distinctly narrowed at the base, 

 and widely roundly emarginate at the apex. 



Comes near to Prohus. 



Tyanites rufipes, sp. nov. 



Black ; the basal half of the antennse reddish-yellow ; the apical 



half brownish beneath ; a mark on the pronotum and the scutellum 



yellowish ; the basal two segments of the abdomen red ; the legs 



ferruginous-yellow, with the coxob and trochanters black ; the wings 



