MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES, 



171 



Nerice bidentata Walker. 

 (I'l. VII. (iy. 1.5.) 



Nerice hhleiiliila Walk., Cat. Ije]). Br. Miis., v, ji. 1076, 18S."). 

 Pack., Pror. Ent. Soc. Phil., iii, p. 3.58. 18()l. 

 Grote, Chock List N. Aiuer. Moths, p. 19, 1S82. 



ISIarlatt, Trans, of 20th and 21st meetings of Kansas Acad. Sc. for 1887-88. xi, p. 110, 1889. 

 Pack.. Fifth Kep. U. S. Eut. Conini. Ins. In.j. Forest and Shade Trees, p. 267, l.SSIO. 

 Smith, List Lep. Bor. Amer., p. 30, 1891. 

 Kirby, Syu. Cat. Lep. Bor. Amer., i, p. 487, 1892. 



Neiiiii. and Dyar, Trans. Amer. Ent. Soe., xxi. p. 187. ,lnue, 1894; .lonr. N. Y. ICnt. Soc, ii, 

 p. lU, Sept., 1894. 



Larva. 

 (PI. XI.\. lig. 4, and PL XXIII. Hgs. 1. In, 1&, Ic, lil.) 



Mni-ldll. Trans. 20th and 21st meetings Kansas Acad. Se. for 1887-88, xi. p. 110, 1889. (Figs, of egg, lai'\'a, 

 ]inpa and moth.) 

 Packard. Proc. Host. Soc. Xat. Hist., xxiv, p. 52,5, 1890. 

 Souk-, Psyche, vi. p. 276, .Inne. 1892. (Egg, five larval stages, and |)upa described.) 



Moth. — Three 3 . Head, protliDrax, and thoracic tuft sable-brown, the rest of the thorax and 

 the internal border of the fore \viugs cinereous, edged in front with silvery white; this latter 

 portion of the wing is twice deeply indented by an inner, small, rounded tooth and an outer, large, 

 broadly triangular projection. Tlie dark brown median portion shades into cinereous toward the 

 costo apical iK)rtioii: two short oblique brown lines margined below with cinereous are situated, 

 each in an iiitcrvennlar space, just above the middle of the outer margin. The hind wings, as well as 

 both pairs beneath, are very light brown. A faint median diffuse darker line cros.ses both wing,s. 



Length of body, S , 15 mm.; expanse of wings, i , -to nun. 



I^!l(/. — "0.9 by 0..5.') mm. Shape, hemispherical, with a broad llattened base, irregularly 

 encircled by a whitish cement fastening to the leaf. Surface shining, apjiarently smooth, but 

 when highly magnified is found to be covered with raised lines inclosing minute polygonal, usually 

 six-sided, areas. Color, honey- yellow; after hatching, nearly white." (Marlatt.j "Very like the 

 C'ggoi Xadatd fiibhosa." (Soule.) (For Larval stages 

 I-IY see Appendix A.) 



Larra. — "Lengtli, l.Uo inches. Genei-al color, 

 polished bluish green. Head narrower above than 

 below and larger than segment 1 ; head of the same 

 l>()lished green hue as the body, with four perpendic- 

 ular silvery green lines, tlie two outer ones running 

 parallel to the triangular piece and then taking its 

 V-shaped f(U'm. A row — four to .six — of minute black 

 eye-spots at base of palpi. Three thoracic segments, 

 above pale silvery green, interrupted, however, by a 

 straight dorsal and wavy subdorsal line of the dark 

 bluish green general color. Segments 4 to 11, inclu- 

 sive, each with a large anteriorly directed prominence 

 ending in a bifid ridge, the incision being transverse. • 



the anterior ])ortion being curved backward and larger than the posterior ]>art, the two looking very 

 nuich like the bill of an eagle and susceptible of being opened and closed. Segments from ] to 

 giadually increasing; to 9 about of a size, or showing but a very slight decrease; 10 and 11 

 somewhat smaller and of a size, though the prominence on 11 is more pointed and higher than 

 that on 10. Steej) decline from 11 to anus, with but a very sligiit proniinence on 12. The upper 

 half of the body, including prominences, is silvery-green, with the dark lines already mentioued 

 on thoracic segments, and an oblir|ue dark line running on the other segments from anterior base 

 of ])rominence to the ])osteri()r portion of the following segment. Summits of ])rominences yellowish, 

 with extreme edges brown. Spiracles yellowish with a lilaceous annulafion. Thoracic segments 

 with a lilaceous line, bordered above with yellow immediately aliove the legs; segments 4 and .j with 

 a distinct and the rest of the segments each with an indistinct jiatch of the same two colors in a 

 line with it, frequently becoming confluent and forming another line from 10 to anal legs." (Riley.) 



This larva, judging by the figure and description of Mr, C. L. Marlatt,' is an exaggeration of 





«is*' 





Fig. 68. Xerice hidenfata.- a. moth: ft, larvar c. pnpa; d, 

 folded iuftf iiu-lit.siuff the cofoon. all natural size; e, tlie egg 

 enlarged, with outliue of the surface ])atteni ranch mngnified. 

 C. L. Marlatt, del. 



'Trans. 20tb and 21st anuual meetings of the Kansas Academy of Science, 1887-88, xi, 1889, 110. 



