220 THE CANADIAN ENTOMOLOGIST. 



each vein of the fore wings distinctly marked by a fuscous line on the 

 upper surface, so that the neuration is distinct without denuding the 

 wings ; abdomen creamy white, with a narrow transverse brown line on 

 top of each segment, just before its hinder margin. Al. ex. i$}4 lines ; 

 probably greater than that of any other species belonging to the Tineina. 

 It is the only species in this group, observed by me, which seems to con- 

 form to the law said to be found among other insects and birds of increase 

 in development of peripheral parts in the West. It seems to be a very 

 local species, and of very sluggish habits. I met with it only once, but 

 then found about twenty-five specimens mostly in coitu. They were all 

 found resting on the blades of the soap weed, as it is popularly termed in 

 Colorado ( Yucca), and would require to be thrown violently off from the 

 blade before they would move, but were very active on the wing when 

 once aroused. All of them were found within an area not over one 

 hundred feet square, in a field of about twenty-five acres, and I never saw 

 it elsewhere. This field is on the road to Monument Park, about three 

 miles north of Colorado Springs. The larva will probably be found to 

 feed in some way on the Yucca. At all events, there was very little else 

 in that particular locality on which it could feed. The wings are rather 

 narrower in proportion to their length than in other species of the genus. 



CORRESPONDENCE. 



parasite on samia cecropia. 

 Dear Sir, — « 



I have this fall obtained upwards of a dozen examples of Ophion 

 macmrum from cocoons of Telea polyphemus gathered about Oct. 25th 

 and later. Is not this unprecedented ? 



I have a record from hearsay, but well authenticated, of two cocoons 

 of Sami'a cecropia emerging the seco?id summer. 



I found late in October cecropia cocoons of this year's make, from 

 which some parasite unknown to me had emerged, either through the 

 loose end or through a round smooth hole bitten out of the cocoon, about 

 the diameter of an ordinary lead pencil. The remains in the inner 

 cocoon were mostly small fragments of blackened larval skin, and in one 

 case the entire back of the larva very neatly cleaned. Can any one 

 enlighten me as to the character of this parasite, which is evidently of 

 unusually large size and power. C. E. Worthington, Chicago, 111. 



