1903] COCKER ELL: — SOME APHIDS ASSOCIATED WITH ANTS 217 



FORDA INTERJECTI, Sp. IIOV. 



$ Body oval or ovate, bright yellow, with sutures more distinct tiian in F. kiii^ii. 

 Head broad with tubercle below the eye. Eyes small and dark. No hairs on body and 

 antennae as in F. ktugii ; antennae more slender. Cauda brown and hairy. Lens^th of 

 antennal joints {\\ 45 (2) 60 (3) 120 (4) 60 (5) 114 + 24. A few hairs are found on the end of 

 joint five. 



Hab. — Found at Las Vegas, N. M., Mar. 24, Oct. 11, and at Las Valles, N. 

 M.. Mar. 22. (W. P. & T. D. A. Cockerell.) 



Tychea lasii, sp. nov. 



5 Body oval or ovate, a smooth shining greenish yellow with sutures inconspicuous. 

 Head broad and subtruncate; its front width about half its length and about one fifth its 

 -width at point of attachment to body. Eyes moderately large placed near the posterior angle 

 of the head ; eyes dark brown or black not on tubercles. No hairs on body, legs, or antennae. 

 Length of body 2 mm. 



Prothorax set off from the remaining portion of the body by a slight constriction or 

 deepening of the suture. Remaining body segments without distinct markings or structures 

 above ; they grow gradually shorter to the posterior extremity. The cauda is light brown 

 and is not hairj'. The spiracles are brownish and very distinct. 



The under surface is colored as the upper. The upper portion of the beak is light 

 brownish yellow, extreme tip dark brown. 



Eegs brown, moderately long; the anterior coxae closely embracing the base of the head, 

 the others widely separated from each other by the broad flattened meso- and meta- 

 sternum. Two distinct claws and two tarsal joints on all the legs. 



Antennae five jointed ; second and third joints nearly subequal, fourth very short, 

 fifth with short cylindrical spur about one half the diameter of the segment. The spur has a 

 few hairs (three or four — very short) at the end. Sensoria on fourth and fifth joints large 

 and conspicuous. Length of antennal joints (i) 60 (2) 90 (3) 99 (4) 36 (5) 1 1 1^ + 30. 



Hab. — Found, Jan. 12, on banks of Gallinas River near Las Vegas, N. M., with 

 Lasius americanus. Collected several times since. 



Tychea pallidula, sp. nov. 



Differs from T. lasii by its light yellow color, small size, eyes on tubercles, and relative 

 length of antennal joints, (i) 30 {2) 60 (3) 56 (4) 30 (5) 90 + 18. 



Hab. — Beulah, N. M., 8000 ft. Collected March 28 and several times since. 



It was thought at first that this was the immature form of 1. lasii hvX the speci- 

 mens examined contained eggs and smaller specimens of T. lasii show the third 

 antennal joint as long as or longer than the second and the eyes never on tubercles. 



