THE CANADIAN ENTOMOLOGIST. 31 



spot on the apex of the primaries. Fore wings beneath uniformly a little 

 darker than above. Hind wings beneath much as above, but the darker 

 shade of the exterior margin and apex is not so distinct. The wings 

 above and beneath have the peculiar silken lustre common to the genus. 

 Head, thorax and abdomen ochreous brown. Legs grayish brown, the 

 tarsi a little paler. Length of body 7 mil. Expanse of wings 20 mil. 



The wings are not so broad as in geminata and albipunctata. 



Obtained from a larva found on oak in Amherst. I very much regret 

 that I neglected to take a detailed description, but as near as I can recol- 

 lect the larva was oval or boat-shaped in form, green with several longi- 

 tudinal rows of minute white papillae or spots. The cocoon was round 

 and hard and the moth emerged June 20. 



ADDITIONAL NOTES ON THE GENUS ANTIGASTER 



OF WALSH. 



BY L. O. HOWARD, WASHINGTON. 



In the light of Professor Riley's recent criticism (American Ento- 

 mologist, December, 1880,) upon my conclusion that Antigaster Walsh is 

 synonymous with Eupelnms Dalm., I have gone over the ground again 

 with his objections before me, and still adhere to my original view. The 

 objections may be summed up as follows : 



I St. Antigaster has lo-jointed antennae ; Eiipebnus (according to 

 Westwood) has 13. 



2nd. The club is obliquely truncate from beneath with Antigaster, 

 while (according to Westwood) it is ovate with Eupeimus. 



3rd. The first tarsal joint of the middle tibiae is " widened and 

 dentate " with Antigaster, and simply " furnished with bristles " (accord- 

 ing to Walker) with Eupehnus. 



4th. The abdomen is widened behind with Antigaster (? with 

 Eupelnms). 



It is a very easy matter to show, in regard to the first objection, that 

 the discrepancy in the number of antennal joints arises simply from the 



