178 



Depth, thorax .25 inch ; abdominal joint 2, .27 ; joint 3, .30; joint 

 4, 31 ; joint 5, 28 ; joint 6, 27; joint 7, 25, From the posterior 

 part of joint 8 it tapers rapidly to the end. In shape nearly- 

 cylindrical, the bulge in joints 3 to 5 being mostly dorsal. The 

 last joint terminates in 10 hooked, brown bristles in two clusters; 

 the tubercle supporting these is striated longitudinally. Anterior 

 portion rounded, the prothorax containing two slight elevations 

 covered with short hairs. Color black. Head and thorax finely 

 granulated, the first four abdominal joints punctured with a few 

 larger depressions, mostly smooth and shining. Duration of this 

 period from 11 to 12 days, one day devoted to spinning in addi- 

 tion to this. 



As intimated before, the larvae from which the above descrip- 

 tions were taken were obtained from a cluster of eggs found on 

 a ripe strawberry. There were 29 of the eggs, but only two lar- 

 vje were reared through all their changes. The eggs were found 

 May 20, 1882; the first moth appeared July 13, the second, July 

 22, making a total period of from 54 to 63 days, or about two 

 months. From captures for several years I had supposed the 

 species to be two brooded, one in May from larvae that hibernated 

 and one in September, but a two month's period from egg to 

 moth will give us three broods in a season, one in May, one in July 

 and one in September. I have this year found them in July and 

 the first of August, though I had not noticed them before. 



The specimens reared from these two larvae were first a <J of 

 the form PJialcrata figured in Harris, and second form Nais a ? ; 

 though this can not be altogether a sexual variation, for my other 

 specimens of this form are males. The male answers well to 

 Harris's figure and description of A PJialerata, having " the hind 

 wings next to the body, and sides of the body, reddish," the 

 general color of the wing being reddish, but not so much so as 

 next to the body. The costal margin of hind wing is black, with 

 two small spots along the outer margin. My cabinet specimens 

 vary from two to four of these spots. The second form or the ? has 

 the hind wings more distinctly red, a black costal margin to which 

 is joined a discal dash and large apical spot, and a long angular 

 spot below the apex on the outer border. Further along in the 

 outer border towards the anal angle are two large, nearly round, 

 black spots joined together. This seems to answer to Dr. Morris' 

 description of Nais with the exception of the color of the hind 

 wings. All my males of this form agree nearly with this in mark- 

 ing, but the ground color of the wing is lighter. I have not 

 Drury's plate or description by me, but may say that this corres- 

 ponds with another ? Nais identified for me by Mr. A. R. Grote. 

 Of course there is a bare possibility that the cluster of eggs on 

 the strawberry was deposited by more than one moth, but there 

 is not much probability, as they were in a single cluster. If we 

 take it for granted that the two forms had a common parentage, 



