ECOLOGY OF ISLE ROYALE. 319 



Andfciiidac. 



Halictus leroHxii Lepeletier/ (Det. Cra-wford). One specimen about 

 camp at Eock Harbor (133). 



Geographic range: Described by Lepeletier 1S41, p. 1272 from "Am. 

 Boreal." Occurs at least as far ^\•est as Illinois, Robertson, 1S!)3, p. 146. 



Haliefus rcrsans Lovell. (Det. (_'rawford). Five specimens on flOAvers 

 of Phijsocurpitfi in Ransom clearing (II, 1), (14S). 



Geographic range: Described from Maine by Lovell. 



Prosopidae. 



Pi-osopis hasiili.'^ Smith. (Det. Crawford and Titus). One about clear- 

 ing at Rock Harbor (166). 



Geographic range: Described from Hudson's Bay l)y Smith, 1853, 

 p. 23 and occurs from the upper Atlantic coast to at least the moun- 

 tains of Colorado. 



Prosopis species. (Det. Crawford). On flowers of Opulaster (V, 2) 

 behind camp at Siskowit Bay (203) ; in camp clearing at same place 

 (212) and two unmarked specimens. There may be two species involved 

 here but we were unable to specifically determine them. The species of 

 the genus breed in stems of small plants. 



Crahyonidac. 



Craljro singularis Smith. (Det. Crawfoi'd). One specimen on sand 

 beach on a jack pine ridge near Conglomerate bay, (108). 



Geographic range: "Canada and United States." 



Solcnius sp. (Det. Titus and Crawford). One specimen about camp 

 at Rock Harbor, (179). 



Pc inphredonidae . 



Diodontus adamsi n. sp. Titus (Det. Titus and Crawford). On sand 

 beach with Aiiimophila at end of Conglomerate bay (31). Xotes on 

 AiiimophUa will apply to this species. 



9 Leng h 7.1 mm. Black, with scattered silvery pubescence, espec- 

 ially abundant on face; clyijeus projecting, with two sharp teeth wide 

 at the base, tips of mandibles reddish, palpi brown ; tegulae brown, 

 yellow in front; wings slightly infuscated; tibiae and tarsi reddish 

 brown. 



t^phef/idac. 



Ammophila sp. (Det. T. & C). Three on sand beaches at head of 

 Conglomerate bay (31) ; one near Tonkin bay (41) ; and one about camp 

 at Rock Harbor (133). The normal habitat of this species of sand- 

 wasp is on the sand beaches.. They fly rapidly about at a height of 

 3-15 centimeters over the sand or gravel, alighting only on the 

 sand. This group all store their nests with caterpillars, the holes being 

 usually in quite hard groimd. They are very skillful in removing or 

 covering up all traces of the place where they have worked, often going 

 to much more labor than the occasion would seem to require. Peckham 

 and Peckham, 1898, pp. 6-32, have a very interesting chapter on this 

 subject. 



