68 APPLE LEAVES, APHIS ATTENDANTS SARATOGA TETANOCERA. 



Similar to the fly last described, in size and in the dots of its 

 wings, is another species which Macquart regards as being the 

 Tetanocera guttularis, of Wiedemann, although it differs slightly. 

 &om his description. The genus Tetanocera belongs to a small 

 gmnp of the Ortalidan flies, differing from the other genera in 

 having the second joint of the antennse equal in length to the 

 third joint, instead of being but half as long or less. Another 

 character presented by all the species I have seen I do not ob- 

 serve noticed in books. The whole surface of the wings in our 

 American Tetanocerides is finely striated with obtusely impressed 

 lines and intervening ridges, which have a longitudinal direction 

 towards the apex, and an oblique one towards the inner margin. 

 These flies also subsist upon the honey-dew secreted by plant-lice, 

 and, according to Desvoidy, their larvse live, some in the unripe 

 seeds of plants, others in the parenchyma of the leaves, stems or 

 roots. In addition to the guttularis or Dotted-winged Tetanocera, 

 we have, common in the State of New York, a species which is 

 probably the Canadian Tetanocera (T. Canadensis) of Macquart, 

 although the spots in' its wings are sub-hyaline rather than white, 

 and there are six only of these spots in the outer or costal cell. 

 Associated with this species is frequently found another," similar 

 to it in size and colors, but without any sub-hyaline spots in the 

 dusky outer and apical margins of the wings. From that part 

 of our State in which I have captured this species, I propose for 

 it the name Saratoga Tetanocera (T. Sarategensis), as the mineral 

 waters in this neighborhood have given to the locality a world- 

 wide celebrity. 



The dried specimen of this fly measures 0.23: to the tip of the abdomen and 0.3O 

 to the end of the wings. The head above is golden yellow with two small rusty 

 stripes on its fore part, a black spot at basp and dot eaeh side anteriorly, almost in 

 contact with the eye, and a second one, also black, on the anterior margin between 

 the eye and the antennae. Face ^Ivery white. Antennae light yellow, second joint 

 longer than broad, with line short- black bristles along its upper and under edge • 

 third joint tinged with brown, narrow and curved, its upper side being concave its 

 lower side convex and nearly parallel with the upper side, hut slightly narrowing 

 tWards the apex, which is rounded; seta yellowish white, plumose. Thorax pale 

 dull yellow, with a faint darker stripe each side of the middle, which stripes have 

 an ash gray reflection when viewed from the front; clothed with a short black 

 beard and a few long black bristles. Scutel ash gray with two nearly erect black 

 bristles each side. Poisers (the little pedicels back of the insertion oi the wingSj 



