March, i9-'i.] MacGillivrav: Xew Species OF Xematinae. 31 



ments subcqual ; head and thorax polished; wings hyaline; veins, costa, and 

 stigma pale ; saw-guides stout, broad, dorsal margin straight, ventral margin 

 convex, distal portion convex and obliqui-, pointed above L, ntrth 4.5 mm. 

 Habitat: Orono, Maine. Sub. 229. 



This species differs from grcganus Marl, in the lurm of its frontal 

 crest. 



Pachynematus roscidus new species. 



Female. — Body black with the following parts yellowish ; labrum, mandi- 

 bles, collar, tegulae. legs except distal portion of metatibix and metatarsi, ven- 

 ter of abdomen except first and caudal sterna and saw-guides, caudal tergum, 

 and narrow bands on caudal margin of other terga ; occipital and vertical 

 orbits faintly rufous ; clypeus narrowly cmarginate, lateral angles broadly 

 rounded ; median fovea deep, longer than broad, pit-like ; frontal crest nar- 

 row, linear, unbroken ; ocellar basin limited by distinct linear, elevated, lateral 

 walls, surface flat : head and thorax setaceous ; head not dilated behind com- 

 pound eyes ; antennae with third segment longer than fourth and fourth longer 

 than fifth ; wings hyaline ; veins, stigma, and costa, except proximal and 

 distal portions, brownish ; saw-guides stout, dorsal margin straight to slightly 

 concave, ventral margin convex, distal portion oblique. Length, 6.5 mm. 



Habitat: Adirondack Mountains. C. O. Houghton, collector; Orono, Maine. 

 Sub. 22-. 



This species is related to robustns Marl. 

 Pachynematus repertus new species. 



Female. — Body black with the following parts yellowish white: supra- 

 clypeal area, clypeus. labrum. mandibles, mouth-parts, pronotum, tegulz. legs 

 except distal one-third of metafemora, distal one-half of metatibise, and meta- 

 tarsi, abdominal sterna except caudal one. and caudal abdominal tergum in 

 great part; pale parts of head and caudal tergum whiter than other pale parts; 

 clypeus narrowly, roundly, comparatively deeply emarginate ; median fovea 

 elongate, about three times as long as broad, shallow ; frontal crest narrow, 

 not prominent, unbroken ; ocellar basin distinct, depressed, shallow, polished 

 fovea ventrad of median ocellus, limiting lateral walls distinct, linear ; head 

 and mesonotum setaceous ; mesoscutellum glabrous and polished ; wings hya- 

 line : stigma and veins brownish, costa yellowish ; saw-guides with dorsal 

 margin straight and oblique, ventral margin convex, distal portion bluntly 

 convexly rounded. Length. 6 mm. 



Habitat: Ithaca. New York. N'o. 1 77-1-2. 



This species differs from pallivctitris Cress, in the form of its 

 median fovea. 



Pachynematus refractarius mw species. 



Female. — Body luteous with the following parts black : antrnnx. »pot« on 

 median and lateral lobes of mesonotum. round dot on caudo-mesal anui*- nf 



