1864.] 627 



cylindrical-oval, \ longer than wide, and all of them as well as the terminal 

 one slightly obfuscated; pedicels hyaline and about J as long as the joints: ver- 

 ticils springing densely and evenly from every part of the oval joint, directed 

 as usual, and about J as long as the complete joint from which they spring. 

 Abdomeyi 9 with the oviduct scarcely ever exserted, and when exserted only i 

 as long as the rest of the abdomen. Legs with more or less of the tarsal tips, 

 and sometimes the superior surface of the tibiw. slightly dusky. Wings heavily 

 fringed behind, liglitly on the costa, covered with minute, appressed hairs, and 

 slightly tinged as well as their veins with gamboge-yellow throughout, or some- 

 times towards the tip in certain lights with dusky ; costal vein moderately ro- 

 bust ; 1st longitudinal often not confluent with the costal till it reaches half 

 way to the tip of the wing; cross-vein distinct, placed l-5th of the way to the 

 tip of the wing. Anterior branch of the .3rd longitudinal springing from that 

 vein at an angle of 135° for a minute space, then curving suddenly and proceed- 

 ing straight towards the margin of the wing until close to the tip when it is 

 slightly recurved, the whole branch thus describing one half of the outline of 

 the link of a log-chain 6 or 7 times as long as wide and longitudinally bisected. 

 In other respects the neuration agrees precisely with fig. 2, Dipt. N. A. p. 174. — 

 Length (dried) % .06— .07 inch, J .05— .07 inch. Wing % .07— .09 inch, 9 .07— 

 .10 inch. 



Described from 4 ^S 10 9 , bred from the gall aS'. strobiloidpn of the 

 same summer's growth, August 31 — September 13. I know nothing 

 positively of its Natural History, the larva and pupa being both of them 

 undiscovered by me ; but as there was nothing in the vase, where I 

 bred them, but the galls and a few inches of the twig attached to each 

 gall without any leaves remaining on it, the larva must have lived either 

 in one or the other, most probably under the scales of the gall like Cec. 

 (ilboviftafa n. sp., of which numerous specimens came out in company 

 with it. Thinking it just possible that the pale color in this insect 

 might be partly due to immaturity, I confined one of them in a glass 

 vessel for 24 hours, exposed to the light, and it did not become one 

 particle darker. A European Diplosis, D. tibialis Wz., was " reared 

 from the same gall as Cec. sallcina Schr.," according to Osten Sacken, 

 ( Dipt. N. A. p. 179.) Hence we may conclude that, as my Diplosin 

 was an iuijuiline in a Willow-gall made by a true CWldomj/la, the Eu- 

 ropean Dlplosls was so likewise, both galls, as I infer from the name 

 sallcina, growing on the willow. D. atrorularls 9 comes very near to 

 Gee. grossnlarlse, Fitch, but in that species the pedicels of the antennae 

 are only '' J as long as the joints," instead of f . the oval joints of the 

 antennae are "more than twice as long as broad" instead of I5 times as 

 long, and the wings are "faintly tinged with dusky" instead of with 



