20 THE CANADIAN ENTOMOLOGIST. 



July. The following is a description of the female described from seven 

 specimens. 



Isosoma VITIS, 9 n. sp. — Expands about one-sixth of an inch. Head 

 large, flattened in front, black, thickly punctured, and covered with many 

 short whitish hairs ; mandibles pale brown at base, tipped with black ; an- 

 tennas black, thickly covered with whitish hairs, nine jointed, inserted 

 in deep sockets; the first joint pale brown, more slender than the others, 

 very long, nearly as long as the three following, the second short, third to 

 eighth inclusive nearly equal in length, the terminal joint longer, tapering 

 slightly towards the tip. Thorax black, punctured, and covered with whitish 

 hairs. 



Wings clear, iridescent, venation simple, consisting of a single vein. On 

 primaries the basal portion of this vein runs a little above the middle of wing, 

 when less than half way towards the apex it is curved to the costal margin 

 where it is thickened, and runs parallel with the edge a short distance; then 

 dividing, one portion extends somewhat further along the edge of the wing, 

 lessening in thickness towards its extremity, the other with a short outward 

 curve terminates a little within the costal margin, and is widened at the tip. 

 There is a slight duskiness about the inner portion of these branches, extend- 

 ing back to near the point where the vein first joins the costal edge. 



The basal portion of vein on secondaries is thickest, and is coalescent with 

 the costal margin for nearly one-third of its length, then contracting in size 

 it turns inwards another third towards the middle of wing, — the terminal 

 third increasing in size, extends to the costal margin, and runs a short dis- 

 stance parallel with it, the whole vein extending little more than half the 

 length of wing. Both veins are sprinkled with many minute black dots, 

 from which arise short black hairs; they are also partially fringed with hairs. 



Abdomen long, black, straight smooth with a polished surface, placed on a 

 short pedicel- — -'the first ring very narrow, second and third a little wider 

 and nearly equal in size, the fourth fully as wide as the three proceeding, fifth 

 less»than half the width of fourth, sixth a little shorter, terminal ring some- 

 what longer. The abdomen is a little contracted at its anterior extremity 

 thickest on the third ring, lessening gradually in size till it reaches the last 

 two segments, which are suddenly contracted, the terminal one ending in a 

 point, with a few whitish hairs about and near the top. Anterior pair of feet 

 pale brown, trochanters nearly black, second and third pairs have the tro- 

 chanters black, femur and tibia nearly black along the middle, pale brown at 

 each extremity, tarsi pale brown. 



The male differs from the female in having the joints of the antennae some- 

 what longer and more thickly covered with hairs ; the hairs are also longer; 



