ACIPTILUS. 57 



genus Lioptilus, but does not agree in its remaining 

 characters with any other genus of the Pterophoridae. 



In the absence of a defined posterior angle to the 

 upper lobe of the fore wings it is not unlike Mime- 

 seoptilus phoeodactylus, Hiibn., of which Dr. Jordan 

 (Ent. Month. Mag. 1869, p. 124) writes : "phceodac- 

 tylus certainly does not belong to this group" (the 

 Mimeseoptili) " nor to any of the Swedish genera ; " 

 "its position is well indicated in Staudinger's list, 

 between the Oxyptili and Mimeseoptili ; " but that 

 insect has quite different palpi ; moreover, it has the 

 upper lobe of the fore wings thicker, less acuminate, 

 and less depressed at the apex than in the species 

 above described. 



It may possibly become the type of a new genus 

 when the North-American representatives of this 

 family have been more completely studied; but 1 

 shall not venture to found one upon the single 

 specimen now before me. 



ACIPTILUS, Hub.ier. 



Aciptilus cinerascens, sp. nov. 



(PLATE III. FIG. 13.) 



Capite et antennis pubescentibus, subochmceis. 



Alis anticis dilute subochraceis cinereo-brunneo creber- 



