this same brassicce, or what is extremely close to it, occurs also in 

 South Europe and is figured in Stainton's Entomologisf s Anmial 

 for 1870 as P. ni, one specimen having been found on the south 

 coast of England, which specimen Zeller, ashe wrote me, believes 

 to have come from America. Staudinger would probably charac- 

 terize brassicm as a "species Darwiniana," and there are doubtless 

 individuals of both the species which approach each other so 

 closely as to be undistinguishable. There is such variation in the 

 silver spot in either that it cannot be depended on alone, but 

 Speyer (Europaisch-Americanische Verwandtschaften ; Stettincr 

 Ent. Zeit., June, 1875, p. 165) has presented other differences that 

 are constant in detail, the most noticeable of which are the darker 

 and more irrorate coloring and the interrupted and wavy terminal 

 line of brassicw, against the paler, smoother, more metallic color- 

 ing and the perfectly straight and unbroken terminal line of 7ii. 



The larva is the most common cabbage pest in the Southern 

 States, and is infested with an undetermined parasite, Mr. E. A. 

 Popenoe has found its feeding on the leaves of Crepis, and what 

 appears to be the same has been found by my assistant on 

 Clover, Dandelion, Scnecio scandens, and Chenopodiuin. 



GORTYNA NITELA Guen. (Rep. I. p. 92) — I have proved by 

 breeding that G. ncbris Gn. is but a large, southern form of this 

 species. In the Southern States it is most common in stems of 

 Ambrosia trifida, often producing a swelling or pseudo-gall. Both 

 forms are indiscriminately bred with intermediate variations. See 

 an article by Miss E. A. Smith (7th Report on the insects of Illi- 

 nois, Cyrus Thomas, pp. 1 12-1 14) for additional food-plants and 

 the habit of the younger larvae to infest wheat-stalks, corn, etc. 

 See also Am. Ent. I, p. 252; my " Potato Pests" (Orange, Judd 

 & Co., 1877, p. 91) and Prairie Fanner, August 11, 1877. The 

 insect normally purpates in the stem and when infesting thin 

 stalks like those of most cereals and blue-grass (in which it also 

 is found), often of necessity leaves one stalk for another. 



Anomis xylina. Say (Rep. II, p. 37; VI, 17) — This has since 

 been referred by Grote to Hiibner's Aletia argillacea, which has 

 been generally adopted. See Bulletin 3 of the Commission on 

 the Cotton Worm. While it will doubtless be found convenient 

 in future to separate it from the other species of the ^&X[.\x% Anomis 

 and Hiibner's generic name may therefore obtain, I must confess 

 after a careful examination of Hiibner's figure of argillacea to 

 grave doubts as to the correctness of Grote's reference thereto 

 of our Cotton-worm Moth {xylina, Say). Hiibner's figure lacks 

 several of the most constant characteristics oi xylina. It is fulvo- 

 testaceous shaded with brown, with the under side bright yellow. 

 It lacks the three white specks on primaries and has a dark {orbi- 

 cular f) spot in place of the outer one. It has a large white cir- 

 cular spot with black annulus in place of the dusky elongate discal 

 spot with its double pupil. The wavy lines are almost black and 



