MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 107 



Harris, Ids. Iiij. Veg., Flint's cilit., p. 429, 18152. 



Groteaud Hohiiiaon (quote Angus in lit.), Proc. Ent. Soc'. riiilad.. vi. p. 11. 1S66. 



/>'. I). fTahh, Practical Entom., ii. p. 7, ISfiG. 



Uurris, Kntom. Corresp., p. 308, pi. 2, lig. 1, l,S(;il. 



Le Baron, 4tli Illinois Rept., p. ISO, 1873. Life liistory (fi,i;s.). 



French, Trans. Dri.t. Agr. III., xv, p. 189, 1877. 



J. Marteu. Tran.s. Dept. Agr. 111., xviii. Append., p. 119. 1880. 



JJ. CiMiuiUitt. Trans. Dept, Agr, 111., xviii, Append., p. I(i7, 1880. 



Jr. Saunders, Ins. Inj, Fruits, p. (51, 1883. 



IV. Beiileiimiilhr, Can. Knt., xx, ]). IH, 1888. (Egg ami all tin- larval st,age8.) 



Lui/i/er, Bull. 10, Agr. Stat. Univ. Minnesota, p. 78. March. 1X90. I'l. 1. lig. :">, larva; I'l. II, (ig. 5. n)otli. 



Moth. — Fore wiiias iiiid base of thorax above ciiiiiainoii (IJidg..' Ill, 20): costal sliade russet 

 (Ridg-., III. Ki). not well marked. Tliorncie i)ateb ocliraeeous (IJidg-., V. 7) in IVout, shading' 

 posteriorly into chestnut (Ridg., I\', !>), Lines and discal dots as in I). <nu)iisii, hnt the discal 

 dots are lre(|uently obsolete, and the outer one, when well marked, is seldom linear. The sparse 

 irroratiou, lines, discal dots, and fringe all concolorous, mars brown (Ridg., Ill, l.'i). Outer margin 

 of tore wings distinctly scalloped, and hind wings also i)ereeptibly so. Hind wings pale straw- 

 yellow, cream buff (Ridg., V, 11), immaculate or slightly shaded with brown: abdomen a little 

 darker. LTnderside a little darker than hind wings above, shading into brown on fore wings, 

 especially toward the enter margin. Fringe dark, as above. 



Expan.se of wings, 42-53 mm. 



Paler in color than J), ((iinusii; darker than I). cdJifornim; distingui.shed from Z>. (Irexclii 

 and J), major by its smaller size and less distinct discal dots; from 1>. iJrcdelii further by the 

 absence of a strongly contrasting costal shade; from D. major by the usually i)aler secondaries; 

 but ill this last instance specimens may occur very difficult to distinguish (Dyar). 



The following description of preparatory stages of JJatana minintra is by jMr. Beutenmiillcr 

 (Can. Eut., xx, p. 10) : 



Egg. — Pure white, ovoid, with llattened base, the ajiex with black dot showing impregnation. Laid in masses, 

 from 25 to ,50 on underside of leaf. 



Touiiij larra. — Head black, shining, second segment orange-brown in front, cervical shield black. Body-color 

 chestnut-brown, witli the stripes a little darker, anal clasps and thoracic feet jet black. Length, 3 nun. 



After first molt. — The head jet black, as is also the whole of the second segment and anal segment. Body-color 

 now much darker, as are also the stripes, these being almost obscured, except along the lateral region. Thoracic 

 feet black. Length, 12 mm. 



After second molt . — Head black, rather small ; second segment yellow except the cervical shield, black. The 

 thoracic feet, abdominal and anal legs, and termination of aual segment jet black, while the stripes are very clear 

 yellow on the chestnut-brown ground. Scattered over the body are also a few short sordid white hairs. Length, 

 20 mm. 



Until after this molt the larva' feed upon the underside of leaf (parenchyma), and do not attack the edges 

 until after the third molt begins. 



After third mall. — Head jet black, second segment orange, cervical shield black. Body color reddisli brown 

 with rather broad yellow stripes; anal clasps, tip of legs, and thoracic feet jet black ; underside striped eijually with 

 reddish brown and bright yellow. Length, 30 mm. 



After fourth molt. — Head jet black, ueck yellow, cervical shield jet black, shining. Body chestnut-brown, the 

 stripes bright yellow and equidistant; the feet aud anal clasps jet black, abdominal legs yellow-banded, with jet 

 black outside. The hairs over the body are now quite long. Length, 33 mm. 



Stage next to last. — Length, 26 mm. Head black, as wide as the body. First thoracic segment black. The 

 body is yellow, not greenish yellow, as in the adult, and the stripes are reddish brown, the color of brown rooiiug 

 slate. .lust before molting the first thoracic segment becomes gamboge-yellow on the plate and straw-yellow around 

 the edges, A broad dorsal reddish-brown line, fully twice as wide as the others. There are four lateral stripes, all 

 of the same width, the yellow spaces between tliem only a little more than one-half as wide as the brown bands. 

 The third brown band includes the black spir.acles. Thoracic feet black; suranal plate and anal legs black; midillo 

 abdominal legs dark, four of the legs pale livid reddish; planta' jiale. The hairs are minute, short, not apparent 

 without a lens. 



The head and thoracic segments often held bent over backward, so that the thoracic feet stick nji, while the 

 tail is so bent up as to nearly meet the head. 



Last stage. — Length, 30 mm. Head black. Body with white, conspicuous hairs, many of them one-third longer 

 than the body is thick. The body is now distinctly greenish yellow, and the prothoracic plate gamboge-yellow. 



'See Ridgway's Nomenclature of Colors. 



