178 NEW YORK STATE MUSEUM 



projects when it is watching for prey. There are three moults. 

 They are found where the water is swiftest. 



The pupae greatly resemble those of the T o r t r i c i d s , are 

 nearly cylindrical, slightly pointed at the apical end, smaller pos- 

 teriorly, and of a pale brown color, somewhat darker anteriorly 

 (pl.36, figs. 16 and 17). The abdominal segments are provided 

 with setae; those on the dorsal surface projecting caudad, those 

 upon the ventral surface projecting cephalad. The anal end has 

 8 slender, long, chitinous setae, the apical end of which is bent 

 upwards. The adult is also described, but since it is not an 

 American species, the description will not be reproduced here. 



Genus 36. Eutanypus Coquillett 

 Fur Seals and Fur Seal Islands. 4:341. 1899 



Closely related to T a n y p u s , but the antennae of the female 

 are 8- jointed, of the male 9-jointed, not plumose, the first joint 

 bulbous, about three times as broad as the second; joints two to 

 seven in the female, two to eight in the male, decreasing in length 

 outwardly, the penultimate joint only slightly longer than broad, 

 the ultimate nearly as long as the three preceding joints; eyes 

 deeply emarginate next the antennae, palpi four-jointed. Third 

 vein of the wing simple, fourth issuing from the fifth near its 

 base and forking near the middle of the wing, the fifth also fork- 

 ing near the middle of the wing, its upper branch connected with 

 the fourth by a crossvein; small crossvein and first section of 

 the third vein scarcely longer than broad. Type of the genus E. 

 b o r e a 1 i s Coq. loc. cit. 



It appears from this description that the wing venation musi: 

 greatly resemble that of Dlamesa^ the number of antennal 

 joints and the lack of long antenna! hairs distinguishes the male 

 of the genus from D i a m e s a . The females of Eutanypus 

 cannot be distinguished from those of D i a m e ® a . The third 

 vein spoken of in the above description appears to be R2-^3; the 

 anterior fork of the fourth seems to be equivalent to R^-f-s, and 

 the posterior fork the same as the media ; the fifth is the same a» 

 the cubitus. Compare the figure on pl.86, fig.13. 



Eutanypus borealis Coquillett 



1899 Eutanypus Coq. Fur Seals and Fur Seal Islands. 4 : 341 



Female. Head black, opaque gray pruinose, the antennae, 

 palpi, and proboscis brownish black, the antennae nearly twice 



