ECOLOGY OP ISLE ROYALE. 317 



ANNOTATED LIST OF ISLE ROYALE HYMENOl'TERA. 



B. G. TITUS, ENTOMOLOGIST, UTAH AGRICULTURAL EXPERIJIENT STATION. 



The determinations in this group were made in Washington at the 

 U. S. National Museum, ^fr. J. C. OraAvford and myself working over 

 most of the material together. Mr. Theodore Pergande, Bureau of Ento- 

 mology, determined the two species of ants represented in the collection. 

 The general collection of ants are reported upon elsewhere by Dr. W. 

 M. Wheeler. Mr. W. F. Fiske, at that time in the Forest-Insect section 

 of the Bureau of Entomology, very kindly determined the Ichneumons 

 and Siricids, both of which groups he had been working with for several 

 years. At the time the determinations were made the writer had no 

 expectation of writing up the notes or he would have doubtless been able 

 to add considerable to their value by making further notes on the speci- 

 mens retained at the National Museum. 



BoniMdae. 



Boiiihiis terrioola Kby. (Det. Crawford.) Three on flowers of Opu- 

 laster (II, 1) (14) : about camp at Rock Harbor several specimens (133, 

 166 three, 179, 191) and one specimen (222) around camp at Siskowit 

 Bay. 



Geographic Range: Originally described from Canada; Kirby, 1837. 

 Also reported by Provancher from region around Montreal and by 

 other authors from various localities in Northern United States east of 

 the Rocky mountains and as far south as Colorado. I have seen speci- 

 mens from Massachusetts, New York, Illinois, Kansas and Colorado. 



Bomhus consimilis Cress. (Det. Crawford.) Two were taken around 

 camp at Rock Harbor (36, 45). 



Geographic Range: Described from New York, Cresson 1864, p. 41 

 and reported by Packard, 18G4, p. 112. 



Bonihus sp. One flying over beach at end of Conglomerate bay (31) ; 

 one on flowers of D. trifida on a jack pine ridge (23) ; and two about 

 camp at Rock Harbor (A. 5, 98). These all seem to represent one species 

 but neither Mr. Crawford or myself care to name it in the present un- 

 settled condition of the group. 



Psithyriis latifarsus Morrill (Det. Crawford.) Two around camp 

 clearing at Rock Harbor (A 36, 45). 



Geographic range : Desc. from Montana by Morril 1903, p. 224. 



Megachilidac. 



Monwinetha alhifrons Kby. (Det. Titus.) One specimen flying over 

 ridges near Conglomerate bay, (68). 



Geographic range: Desc. by Kirby 1837, p. 270 from "Lat. 65°"; 

 again by Cresson 1864, p. 387, 388, as three separate new species from 

 Colorado, Pikes Peak, and Slave Lake. It probably occurs over all the 

 region from the Mackenzie river and Upper Hudson bay to the lower 



