16 BIOLOGICAL SURVEY OF 



Cytheropteron alatoides spec. iiov. (fig. 8) 



This species has a smooth, white shell. It may be consid- 

 ered intermediate between C. alatum G. 0. Sars and C. ha- 

 matum G. 0. Sars. The points of the wings are excurved, 

 somewhat as in C. hamaium, but the comb found on the 

 posterior margin of the wings in C. alatum is also present. 

 In addition to the spur-like point at the tip of the wing, two 

 to four smaller spurs may be found on the posterior margin 

 of the wing, crowded up against the terminal spur. 



Length : 0.70 mm. 



Cotypes: B 167. 



Kemarks: The specific name refers to the resemblance of 

 this species to C. alatum. 



