234 THE CANADIAN ENTOMOLOGIST 



margin of first segment, and mesal spots on caudal margin of sixth and seventh 

 segments; oceliar basin deep, distinct; frontal crest prominent, unbroken, curved 

 on dorsal margin ; median fovea shallow, elongate oval ; clypeus broadly, shallowly 

 emarginate; head dull, sparsely setaceous; mesoscutellum polished, mesonotum 

 dull, caudal margin of mesopostscutellum punctured with small calices; meso- 

 pleura polished; antennae with third and fourth segments subequal, fourth seg- 

 ment distinctly longer than fifth; wings hyaline, spinulae inconspicuous, rufous, 

 veins and costa and stigma in great part rufous; saw-guides with dorsal margin 

 concave, ventral margin convex, converging toward distal end. Length 8 mm. 



Habitat. — Orono, Maine. Maine Agricultural Experiment Station, Sub. 110. 



This species is similar to ediira MacG., but the form of the frontal crest will 

 separate them. 



Pteronidea effeta, n. sp. — Female. Body black with the following parts 

 yellowish white: clypeus, labrum, supraclypeal area, mouth-parts, collar, tegulae, 

 caudal angles of lateral lobes of mesonotum, and legs beyond coxae except distal 

 half of metatibije and metatarsi; following parts rufous: caudal portion of first 

 abdominal segment, segments two to six entirely, most of seventh, frontal crest, 

 and occipital and vertical orbits; clypeus broadly deeply emarginate; supra- 

 clypeal area swollen; median fovea elongate, linear, comparatively deep; frontal 

 crest distinct, slightly broken, dorsal margin curved; oceliar basin distinct, not 

 deep, open around median ocellus; each side of lateral ocelli depressed; sur- 

 face for most part polished; mesonotum including mesoscutellum and meso- 

 postscutellum polished, roughened with distinct calices of minute setae; antennae 

 with third segment slightly longer than fourth, fourth and fifth subequal; wings 

 hyaline, veins and stigma and costa rufous; saw-guides robust, dorsal margin 

 concave, ventral margin convex, distal portion oblique, bluntly pointed above. 

 Length 10 mm. 



Habitat. — Orono, Maine. Maine Agricultural Experiment Station, Sub. 

 158. 



This species runs to popidi Marl., but the topography of the head will 

 separate the two species. 



Pteronidea emerita, n. sp. — Female. Body black with the following 

 parts yellowish; labrum, clypeus, supraclypeal area, mandibles, mouth-parts, 

 collar, tegulac, and legs except distal three-fourths of metatibire and metatarsi; 

 lollowing parts rufous: frontal crest, occipital and vertical orbits, and abdominal 

 segments one to six; clypeus broadly, shallowly emarginate; median fovea a 

 large, slightly depressed, triangular area; frontal crest strong, narrow, unbroken, 

 oceliar basin deep, open about median ocellus, strongly elevated above post- 

 ocellar area; antennae with third segment longer than fourth, and fourth dis- 

 tinctly longer than fifth; head and thorax polished, with numerous minute 

 setffi, mesoscutellum i)are, mesopostscutellum with caudal margin roughened; 

 wings hyaline, veins and costa and stigma reddish; spinuhc point-like, black; 

 saw-guides with straight dorsal margin, convex ventral margin, converging 

 convex distal portion, blunt distal end. Length 9 mm. 



Habitat. — ^Orono, Maine. Maine Agricultural Experiment Station, Sub. 139. 



This species is very similar in general appearance to effeta MacG. 



Pteronidea erudita, n. sp. — Female. Body black with the following 

 parts yellowish: labrum, clypeus, mandibles, supraclypeal area, collar, tegular. 



