108 MEMOIIIS OF TUB NATIONAL ACADEMY OF SCIENCES. 



The stripes are black, not reddish dark brown, as before. The third or spiraciilar band is a little wider than before, 

 and continued on to the prothoracic segment under the ganiboge-ycllow plate. Base of the legs and space aniiind 

 and between them honey-yellow, not dnll reddish yellow, as in the iirevions stage. Middle abdominal legs reddish 

 yellow, -with a large lilack chitinous plate above the planta. 



Among 77 specimens, forming a clu.ster ou an ai)i)le tree at Salem, Mass., all molted Angn.st 

 18 into the last -stage. There was no variation among these, except very slight differences in the 

 width of the green stripes. 



The larva spins no cocoon, bnt enters the ground to pupate. 



Pupa. — Of the usual shape. End of abdomen obtuse, cremaster with a short bifid spine, each 

 fork ending in two spinules, with an external shorter mesial one at base. 



Habits. — From Mr. D. S. Harris, of Cuba, 111., we learn that in LSSli the caterpillars of this 

 species were "so abundant on the black walnut that manj persons liave cut down their walnut 

 trees when they were near their houses." The larva is to be found from the latter part of July to 

 the last of Sei^tember. It is single brooded. It occurred at Providence, 11. I., on the birch, 

 September 10-12. 



The characteristic attitude of this, as other species, when disturbed, is to raise the head and 

 tail, each about as much as the other, the entire caterpillar forming three sides of an oblong 

 square. When feeding, the last fourth of the body is slightly elevated. The larv* remain 

 clustered together throughout life, until they disperse to pupate. 



Mr. Lugger states that the eggs are deposited, several hundred together, in a patch upon the 

 underside of terminal leaves. Each egg is white and spherical. In ilinnesota the caterpillars 

 "fre(pK'iitly occur in vast numbers, entirely defoliating our largest oaks." The moth in Minnesota 

 issues late in June or early in July. 



Mr. Lugger found one caterpillar covered with 249 eggs of a Tachina tly. 



Eggs, June (Riley); larva', August, September, October, and November (Riley); moth, May, 

 July, and August (Eiley). 



Food plnntn. — Apple, jtear, cherry, quince, linden, walnut, hickory, oak of various species, 

 chestnut, beech, hazel, hornbeam, birch, locust, etc. (Beutenmiiller). In Kansas, Beiula nigra 

 (Popenoe) and Quercus palustris (Popeuoe); hickory, birch, oak, suinat', and walnut (L'iley). 



Geographical distribution. — Orono, Me. (Mrs. Fernald); Bruuswick, Me. (Packard); Salem, 

 Mass., Boston (Harris, Packard); Amherst, Mass. (Mrs. Fernald); New York (Angus, Beu- 

 tenmiiller, Dyar); New Jersey (Palm); Chicago (Bolter, Westcott); Pennsylvania (Streckei'); 

 Manhattan, Kaus., June 13 (No. 5) (Popenoe); Canada, New Hampshire, Maine, New York, 

 New Jersey, Pennsylvania (Palm); Missouri, Di.strict of Columbia, and Virginia (U. S. Nat. Mus.); 

 New York, New Jersey, Ohio, Wisconsin, Champaign, 111., California (French). 



Datana californica Riley (inedited). 



The only notes we have on this itnpublished species are the following: 



Datana Californica. 

 Dyar, Trans. Amer. Ent. Soc, xxi, p. 198. 1894. 

 Larva', October 13, also adult; Santa Clara County, Cal. 



XoTK. — These larvie have heen known to fruit growers at Santa Clara for several years back as doing injuries 

 by stripping whole rows of apple and plum trees. They do not attack pear trees. A few larvie -were still present 

 on October 13, 1887, and about the defoliated trees many pupte were found in the loose, dry soil, but most numerously 

 among bunches of grass, where they frecjueutly occurred several together. (Riley.) Professor French also reports 

 it from California. 



Dr. Dyar informs me that Dr. II. II. Behr has found the larva' on the oak near San Francisco, 

 but failed to obtain the moth. "According to recoUei'tiou, it is .just like ministra, but paler 

 throughout; about the color of Xadata behrensii (pinkish buff)". (Ridgway, v. II.) 



Datana califoniica ?. 



(PI. XI, fig. 1, la-lc.) 



I have received nine or ten larvae from Olynipia, Wash., from Mr. Trevor Kincaid, who sent 

 them early in October, and one of which lived ou until the second week in November, the others 

 pupating in the earth. They were feeding on Qiiercus g((rrii(iiia. I have also i-eceived (August 1) 



