16 Bulletin American Museum of Natural History. [Vol. XXIII, 



of Eucharis myrmecice. These piipte, according to Forel, were "couvertes 

 d' asperites et de boursoufHures," probably analogous to the pustules above 

 described for the pupa of Orasevia. He concluded that the Eucharis 

 attacks the Myrmecia larvse, but after what I have said of Orasema it is 

 more probable that the Chalcidid attacks the semipupa or pupa of the ant 

 after the cocoon is spun and encloses both host and parasite. 



In the same paper in which the Eucharis is described, Cameron de- 

 scribes a member of another genus, Chalcura bedeli, which was taken in 

 nests of the Algerian Myrmecocystus viaticus. 



Wasmann in his 'Verzeichniss', published in 1894,^ cites as the only 

 Chalcidids known to occur with ants the two preceding species described by 

 Cameron and a Chalcura sp. which was "bred from cocoons of Formica 

 Tufa at Prag (Polak)." 



Another Chalcidid belonging to the subfamily Eucharinse and closely 

 related to the preceding, was accidentally detected in some alcoholic material 

 of Camponotus ligniperdus var. novceboracensis Fitch, collected August 12, 

 1904, on a bare slope of the Porcupine Mountains in northern INIichigan by 

 Mr. Otto McCreary and sent me for identification by Dr. Charles C. Adams. 

 Two of the worker cocoons, measuring respectively 6.5 and .7 mm., were 

 found to contain pupal parasites, which Dr. i\.shmead has identified for me 

 as Pseudochalcura gibbosa Provancher. In one of the cocoons, represented 

 in Plate II, Fig. 29, there were two pigmented and therefore nearly mature 

 pupse, lying face to face near the anterior pole, while the remains of the ant 

 pupa, which they had consumed, were crowded against the black meconial 

 spot at the posterior pole. The other cocoon contained four unpigmented 

 pupae. It would seem that the Chalcidid larva must attach itself to the 

 Camponotus larva and wait till it has spun its cocoon, before devouring the 

 host. As the ant is an unusually large species compared with the parasite, 

 several of the latter can obtain sufficient nourishment even from a single 

 worker and need not, like Orasema, attack the still larger intermediate, 

 soldier, and female brood. 



I have received with some miscellaneous ants {Formica fusca var. neorufi- 

 barbis, Myrmica brevinodis, etc.) collected by Mr. H. Viereck, on the summit 

 (11,000 ft.) of the Las Vegas Range, New Mexico, a single male specimen 

 of a Eucharis (PL IV, Fig. 62), which is in all probability an ant parasite, 

 although I am unable to refer it to its precise host. 



In the discussion following a paper read several years ago by Ashmead 

 before the Entomological Society of Washington,^ Howard called attention 



' Kritisches Verzeichniss der Myrmekophilen und Termitophilen Arthropoden. Berlin, 

 1894. 



2 Notes on the Eucliarids found in the United States. Proc. Ent. Soc. Wash., II, 1890-92, 

 pp. 354-358. 



