THE CANADIAN ENTOMOLOGIST 235 



lateral halt" of each lateral lobe of the mesonotum, and legs beyond middle of 

 coxce except distal third of metatibiai and metatarsi; following parts rufous: 

 frontal crest, occipital and vertical orbits, and abdominal segments two to seven; 

 clypeus broadly, shallowh- emarginate; median fovea elongate, shallow, furrow- 

 like: frontal crest broken, high adjacent to meson, low on lateral portions, 

 dorsal margin two sided; ocellar basin shallow, flat, open about median ocellus, 

 hardly raised above postocellar area; antennae with third, fourth, and fifth 

 sei;ments subcqual ; head and thorax polished, with closely-placed calices of fine 

 seta-; mesopostscutellum roughened; Avings hyaline, veins and costa and stigma 

 reddish; saw-guides narrow, dorsal margin straight, ventral margin convex, 

 distal portion straight and convergent, pointed. Length 7 mm. 



Habitat. — Orono, Maine. Maine Agricultural Experiment Station, Sub. 12. 



This species is similar to effeta MacG. and emerita MacG. The colour of 

 the mesonotum will distinguish them. 



Pteronidea edita, n. sp.— Male. Body black with the following parts 

 x'ellowish: clypeus, labrum, supraclypeal area, mandibles, genal orbits, pronotum 

 l:)roadly, tegulae, legs except metacoxae and distal end of metatibise and meta- 

 tarsi, and caudal miargin of abdominal terga and venter entirely; following parts 

 rufous: occipital and vertical orbits broadly, frontal orbits narrowly; median 

 fo\ea deep, broad, longer than broad; antennae with third segment slighth' 

 longer than fourth and latter slightly longer than fifth ; frontal crest obscure, 

 broken; ocellar basin shallow, flat, lateral walls distinct but na.rrow and low; 

 head and thorax dull with num.erous subadjacent calices; mesopleura, particu- 

 larly ventral portion, with numerous short, white setae; caudal margin of last 

 sternum angularly emarginate; wings hyaline, stigma with costal portion dark, 

 remainder yellowish, costa yellowish, \eins blackish. Length 6 mm. 



Habitat.— -Ithaca, New York. H. Yuasa. No. 5^-1-6. 



This species runs to ventralis Say, but the difference in their coloration will 

 differentiate them. 



Pteronidea exacta, n. sp. — Male. Body black with the following parts 

 white: labrum, clypeus, supraclypeal area, mandibles, mouth-parts, genal 

 orbits, collar broadly, tegulse, and legs except a fuscous ring on distal end of 

 metatibiae; following parts rufous: occipital and vertical orbits broadly, frontal 

 orbits narrowly ; clypeus roundly, shallowly emarginate; supraclypeal area not 

 prominent; median fovea a small, rather deep pit; frontal crest fairly strong, 

 unbroken, transverse, straight; ocellar basin shallow, lateral walls hardly ele- 

 vated, surface flat, open between ocelli, and not as high as postocellar area; 

 antennae with third segment slightly longer than fourth, and fourth slightly 

 longer than fifth; head and thorax setaceous; mesoscutellum polished, meso- 

 postscutellum somewhat roughened ; procidentia short, rounded, strongly convex; 

 wings hyaline, veins and costa and stigma yellowish. Length 4.5 mm. 



Habitat. — Orono, Maine. Maine Agricultural Experiment Station, Sul). 

 172. 



This species is similar lo dubia Marl., but the length of the third antennal 

 segment will separate them. 



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

 parts yellowish white: supraclypeal area, clypeus, labrum, mandibles, mouth- 

 parts, genal and occipital and vertical orbits broadly, frontal orbits narrowly, 



