580 NEW YORK STATE MUSEUM 



doubtless continues functional. The fleshy processes and tubercles which 

 surrounded the float in the larva are withdrawn anteriorly in the pupa and 

 flattened down against the sides of this taillike projection so as to be 

 barely distinguishable. 



Larvae, pupae and imagos were easy to find through July and August, 

 never in open water, and the imagos were not found away from water. 



A single parasite bred from a puparium of this species, sent to Mr 

 Ashmead for determination, proved to be new to science. At our re- 

 quest he has prepared the description of it, given on p. 588. Mr Ash- 

 mead says he believes that hitherto nothing has been known of the habits 

 of wasps of the genus Atractodes. 



Tetanocera pictipes Loew 



Plate 14, fig. 9-14 

 1859 Tetanocera x^ictipes Loew, Die nordamerikanisclien arten der Gat- 

 tungen Tetanocera uud Sepedon Wiener, ent. monatschr, 3 : 292 

 1862 Tetanocera pictipes Loew, Monograph. N. Am. Dipt. 1 : 111 

 1878 Tetanocera pictipes Osten-Sacken, Cat. Dipt. N. Am. p. 177. 



I find no published account of the immature stages of any species in 

 this large genus, save an antiquated one by Dufour for the European 

 species T. ferruginea^. The figures are poor. There is an imago of 

 this species, T. pictipes, in the Museum of comparative zoology, 

 reared from the pupa by H. G. Hubbard at Milton Mass. Mar. 27, 1874, 

 and another pupa is pinned beside it. I found larvae, pupae and imagos 

 common at Saranac Inn, associated in all stages with Sepedon 

 fus cip e n n i s. The larvae and pupae are similar to the same stages 

 in Sepedon, but more slender, and with good differential characters ; 

 they are apparently entirely similar in habits. 



The imagos are found in the same bur reed beds, but they rest on the 

 leaves habitually near the surface of the water, and so are little in evi- 

 dence. Imagos of Sepedon, while not more common, were much 

 more easily taken. In fact, I should probably not have found imagos 

 of Tetanocera pictipes, had I not, after breeding one, gone out 

 specially to look for them. 



Larva. (PI. 14, fig. 9, 10) Full grown. Length 10-12 mm; 

 greatest thickness 1.8 mm. 



Color transparent yellowish or greenish brown, lighter shades prevail- 

 ing. Body cylindric, tapering anteriorly to a long point, and narrowed 

 a very little just before the disk at the posterior end of the body. The 

 relative lengths of the segments are about as given for the larva of 

 Sepedon. The three rings of tubercles on each of the abdominal seg- 



I549 Soc. ent. France. Ann. (2) 7 : 67, pi. 3. 



