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 

 from his description. The genus Tetanocera, belongs to a small 

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

 having the second joint of the antenna? 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 larvae live, some in the 

 unripe seeds of plants, others in the parenehyma 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 spe- 

 cies 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 sjiots 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 (71 

 Saratogensis), 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 

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

 rusty stripes on its forepart, a black spot at base and dot each 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 silvery white. Antennas 

 light yellow, second joint longer than broad, with fine 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, but slightly narrowing towards 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 re- 

 flection 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 of the wings, end- 



