IHE CANADIAN ENTOxMOLOGIST. Sol 



S. falci/er : wings brownish; abdomen broader, yellowish red; 

 mesothorax more coarsely punctured. E. States. 



S.fortior: wings practically clear; abdomen narrow, deep chestnut 

 red ; mesothorax less coarsely punctured. Middle Sonoran Zone in New 

 Mexico. 



S. Olympiais : wings practically clear ; abdomen broad, chestnut 

 red, segment 5 black ; mesothorax more finely punctured. Washington 

 State. In S. falcifer the second abdominal segment is distinctly the 

 broadest ; in S.fortior and 6". Olyvipicus it is not or hardly broader than 

 ■the apex of the first. The apical plate of abdomen is much narrower in 

 fortior than in Olyvipicus. 



Sphecodes ( Machceris) Washifigtoni, n. sp. 



One P, 24th June, 1895, Olympia, Washington (Kincaid). 



Length hardly 7 mm.; head, thorax and legs black; mandibles simple, 

 yellowish-red^ black at base and dark at extreme tip, stout and short ; 

 ridge of labrum low, very broadly truncate ; flagellum very faintly brown- 

 ish beneath, scape punctured, joints 3, 4, 5 subequal, antennae placed 

 rather low down ; front extremely closely punctured ; head somewhat 

 broader than thorax : mesothorax shining, with sparse punctures, not 

 obviously sulcate ; tegulse large, dark at base, otherwise pallid ; wings 

 pale brownish, nervures and stigma very dark; enclosure of metathorax 

 semilunar with a distinct rim, irregularly wrinkled ; abdomen yellowish- 

 red, apex of fourth segment, and all of fifth, blackish, practically impunc- 

 tate ; apical plate narrow. The head seen from above is thicker in 

 proportion to its width than in S. Olympicus. 



Allied to 6". siygitis, Rob., but larger, and differing in several small 

 details. 



Sphecodes (Sphecodes ) minor, Robt., Tr. Ac, St. Louis, VIIL, p. 45. 



One p, June 30, 1896, one $ , no date, Olympia (Kincaid). 

 Actual comparisons may prove this different from the Illinois S. minor, 

 but the $ agrees with Robertson's description, and the ^ is unknown to 

 him. The ^ has not only pale tarsi, but the anterior tibice are light 

 reddish, with a blackish cloud behind, and the middle and hind legs have 

 the knees reddish, and the tibiae pale reddish apically. The apical 

 margin of the first abdominal segment is red. 



$ , 24th, 25th May, 1898; 6th June, 1S98; 9th June, 1899, Corvallis, 

 Or. (Cordley). 



