350 THE CANADIAN KNT< >MOLOGIST. 



hypoclypeal area situated between the arms of the V; a large punc- 

 ture on each side of the front representing the antennal furrow, 

 slightly above the enlarged ventral ends of the walls of the 

 pentagonal area; the postocular area twice as wide as long ; the 

 front between the eyes and the pentagonal area broadly, deeply 

 hollowed out ; the vertical portion of the antennal furrow deep, 

 wedge-shaped, sides parallel; the interocular furrow wanting ; the 

 antennae with the first and second segments together three fifths the 

 length of the third, the third segment slightly more than one and 

 one-half times as long as the fourth, the fourth slightly longer than 

 the fifth, the sixth, seventh and eighth successively shorter than the 

 one before, the ninth as long as the sixth, sides parallel and bluntly 

 rounded at apex ; dorsum of the thorax polished, finely, imbricately 

 impressed, its surface setaceous ; the wings infuscated, the veins and 

 stigma black ; the front wings with the free part of R 4 slightly longer 

 than the free part of R 6) R 4 strongly bowed outwardly ; the radial 

 cross vein straight; the greatest length of the cell R 4 nearly twice 

 the greatest length of the cell R 6 ; the legs finely sericeous ; the 

 posterior metatarsus subequal in length to all the following 

 segments together; the second and third segments of the tarsi sub- 

 equal, the fourth segment about one-half the length of the third ; 

 the saw-guides strongly convex below, obliquely truncated at apex, 

 and rather sharply rounded to a point above, the ventral margin and 

 the apex with scattered hairs. Length, 4 mm. Habitat: Columbia, 

 Missouri. C. R. Crosby, collector lineata, n. sp, 



Front wings with the free part of R 4 straight, or approximately so, and 

 the radial cross-vein bowed ; body black, with the knees, the tibia?, 

 except a fuscous spot on the outer half of the tibiae, more pro- 

 nounced on the posterior, the front and middle tarsi more or less, 

 and the hind metatarsus, white ; the walls of the pentagonal area 

 faintly indicated, obsolete on the middle of the front, their ventral 

 ends enlarged, but not prominent, forming a frontal crest hardly 

 raised above the ocellar basin above ; the V-shaped furrow deep 

 and rather broad, with perpendicular walls ; the ocellar basin 

 distinctly broader than long, much narrowed below, the crest of the 

 walls of the pentagonal area strongly converging below, their walls 

 continued almost to the antennal fovea 1 ; the puncture on each side 



