—39— 



two rows of minute black piliferous spots on each side, and all bearing a short light 

 brown hair. Spiracles black. Underside of body same color as above. Length, 

 l6 mm. 



Lives singly in a pyriform case made of frass between the terminal 

 leaves of the branches of Mvn'ca ceri/era. 



Phoxopteris spireaefoliana, CI. 



Head small, yellowish green, with small black spot on each side of the anterior 

 portion, mouth parts pitchy black. l!ody yellowish green with two rows of piliferous 

 spots of the same color along the dorsal region, and two rows on each side. Under- 

 side same color as above. Length, lo mm. 



Food plant, Spiraa; opuli/olia (Nine Bark). Draws together the 

 leaf between two veins so as to produce a fold. Double brooded. June 

 and Sept. Hibernates in a cocoon between leaves. 



The habits of Goes and Oncideres. 

 By JM. L. Linell. 



On the Palisades near New York Goes ptdchra, Hald. , was taken by 

 me last season under circumstances that were strikingly suggestive of the 

 habits of Oncideres cingulata, Say, on Carj'a sp. with large buds, the 

 same that are preferred by the Oncideres, I saw Goes at work on the 

 twigs, cutting through the bark nearly all around (and a little deeper in 

 some places), but very irregularly, not making a clean ring. It impressed 

 me that this must be done on purpose to kill the twig, with the intention 

 of ovipositing on it, a well-known fact in regard to the girdler. The 

 male was generally seen gnawing on the endbud of the same twig that 

 the female was girdling, just as we so often see the pair of Oncideres to- 

 gether. When we take mto account the wonderful resemblance in color 

 and form between these two, though systematically widely separated 

 species, the likeness is still more remarkable though the Goes is twice 

 the size of the Oncideres. I think this is a fine instance f)f analogy in 

 protective resemblance, similarity in habits having independently wrought 

 their re.sults in leading both to resemble the same thing, the maculation 

 of the Carya twig. Both seem to live in the larval state for two years ; 

 in 18S4, 18S6 and- 1888 Oncideres was very abundant, while not a single 

 specimen could be found 1885 nor 1887. The species are not found to- 

 gether; the Goes appear in the first days of July and are completely gone 

 before the end of that month, while Oncideres can not be seen before the 

 last days of August and is abundant throughout September. This oc- 

 curtancc of Oncideres so late in the season, when few collectors visit the 

 branches of trees, accounts for its rarity in collections and my success in 



