346 THE CANADIAN ENTOMOLOGIST. 



with tlie collar white, the front and middle legs below the knees rufous 

 infuscated. Length, 6.5 mm. 



Habitat. — Olympia, Washington. Professor Trevor Kincaid, collector. 



Empria co7idsa, n. sp. — Female. Clypeus with a median carina, 

 roundly emarginate without a tooth, lobes rounded ; the antennal furrows 

 not interrupted ; the ocellar basin broad, with sloping sides, reaching the 

 median ocellus, extending to the middle of the antennal fovese, the median 

 fovea a small pit on a level the dorsal margin of the antennal fovsce ; the 

 ocellar and interocellar furrows distinct ; the third segment of the antennae 

 longer than the fourth ; the saw-guides convex above and below, obliquely 

 rounded at apex above and below to a point slightly above the middle of 

 the apex; body black, with the labrum, collar, tegulae, knees, front and 

 middle tibias and tarsi, all more or less infuscated, white. Length, 7 mm. 



Habitat. — Pullman, Washington. Professor C. V. Piper, collector. 

 No. 13.  



Empria cupida, n. sp. — Female. Clypeus with a median carina, 

 shallowly emarginate with a tooih, lobes acute ; the ocellar basin a broad, 

 shallow depression, broadest near the middle, extending to the median 

 ocellus ; median fovea broad and deep, situated above the dorsal margin 

 •of the antennal fovt^ ; ocellar and interocellar furrows distinct ; the third 

 segment of the antennse longer than the fourth ; the antennal furrows 

 interrupted ; the saw-guides straight above, convex below, obliquely, con- 

 vexly rounded to a point above at apex ; body black, with the collar and 

 front and middle legs below the knees white. Length, 6 mm. 



Habitat. — Olympia, Washington. Professor Trevor Kincaid, collector. 



MISCELLANEOUS NOTES ON THE HYiMENOPTERA CHAL- 



CIDOIDEA: THE GENUS ARTHROLYTUS THOMSON; 



HORISMENUS MICROGASTER ASHMEAD. 



BY A. ARSENE GIRAULT, UNIVERSITY OF ILLINOIS. 



IntroductioJi. 

 In describing a new species of Arthrolytiis Thomson, I merely bring 

 together the literature of the group. 



History a?id Description. 

 The genus Arthrolytus was founded by C. G. Thomson in 1878 with 

 the rank of a subgenus Ptero7naius '^wedtrxxs, 1795. The description of 

 Pteromaliis and the Conspectus subgeneruvi, which includes Arthrolytus^ 

 were given by Thomson as follows : 



October, 1911 



