46 E. T. CRESSON. 



each side of the head posteriorly, tegulae, superior margin of prothorax, a spot 

 on the inferior margin, scutellum, lateral margin of abdomen above and a line 

 on disk of ventral segments, white or pale yellow; antennse with the third 

 joint as long as the two following combined; vertex and mesothorax with 

 coarse punctures; coxae black, anterior tibise with one side spur; wings hyaline 

 with an obscure spot at base of stigma, nervures brown, second branchial cell 

 without cross-nervure." 



Hah. — Canada. (Coll. V, A. Huart). This species is compared 

 •with maculivenfris Harris, from which it is distinguished by the 

 white scutellum, the spots on vertex, the two reddish spots on face, 

 and by its greater size. 



Lyda frontalis Westwood, Thesaurus Ent, Oxon. p. 110, pi. 20, fig. 7. — 

 9- — Black; head yellow, a large mark on vertex, enclosing ocelli and some- 

 times extending to and covering base of clypeus, a more or less distinct spot 

 on middle of occiput, tips of mandibles and palpi, black; remainder of mandi- 

 bles ferruginous; antennse about twenty-five-jointed, black, third joint nearly 

 as long as the three following combined; posterior margin of prothorax and 

 tegulae sometimes luteous; wings fuliginous, violaceous, more or less hyaline 

 at base, nervures black, second branchial cell with incomplete cross-nervure; 

 legs black, anterior tibise without side spur; abdomen broad, violaceous-black, 

 immaculate. Length .65 — .70 inch. 



Mab. — Massachusetts. (Coll. Am. Ent. Soc.) 



liyda insignis Brischke & Zaddach, Schr. phys.-oken Ges. zu Konigsb. 

 vi, (1866), p. 179. — "%. — Shining black; sides of face, basal joint of antennse 

 beneath, tegulse, legs except coxse, and apex of venter, reddish-yellow ; antennse 

 about as long as the body, twenty-four-jointed, the third joint scarcely as long 

 as the fourth and fifth; wings hyaline, nervures and stigma black. Length 

 4.5 lines, 9.9 mm." 



Hab. — Georgia, (Berlin Museum). 



Liyda quebecensis Provancher, Nat. Can. x, 205.— " 9-— Length .36 

 inch. — Black; margin of clypeus, the lines enclosing the ocelli, two oval dots 

 on the vertex, enclosed by two lines in form of crescent, these last touching 

 the occiput and the eyes and dilated at their extremities, tegulse, anterior 

 angles, scutellum, postscutellum, a transverse membranous spot below the 

 raised lines of metathorax, legs and abdomen entirely, honey-yellow ; antennse 

 long, subserrate, joint three twice as long as four; wings hyaline, slightly 

 yellowish, nervures black, yellow at base; abdomen rather darker in color 

 than the legs." 



Hab. — Canada, (Coll. Provancher). 



L<yda Provancheri Huart, Nat. Can. xi, 148. — " J. — Length .40 inch. — 

 Black; aline bordering the clypeus and receiving three perpendicular lines, 

 the middle one extending opposite the insertion of antennae, the other two a 

 little longer, bordering the inner side of the eyes, mandibles except tips, palpi, 

 a. longitudinal spot on inferior part of cheeks, touching the eyes, and tegulse, 

 pale yellow; abdomen beneath except a spot at base of each segment, a rather 

 broad band on upper surface, and a transverse baud on middle of segments 



