AMERICAN LEriDOPTERA. 295 



outward, increasing in width, until it may finally involve a lobe of 

 the leaf. 



The larva is well sheltered under this protection, and in a few cases 

 I have found the mid-rib excavated for half an inch or more, the 

 larva retiring into this tunnel when disturbed. The first spring 

 brood may be looked for on the flowers as well as the leaves of the 

 tulip tree. All of the cocoons observed have been made by cutting 

 out and turning over a flap in side or middle of leaf. 



Larva 10 to 11 mm. Cyliiulrical, less roliust than vifeann, slightly tapering, 

 sordid green. Head yellowish hrown, ocellic field and lateral dash on lohes 

 black; mouth parts are slightly darker than head; pro-thoracic shield dark 

 brown, thoracic legs black. Anal shield not chitinons. 



This is the largest of the American species I have observed. It 

 can easily be separated from others by the rich ochreous color of ths 

 outer half and particularly the apical portion of wing. The sub- 

 terminal patch is smaller than either of the two preceding species, 

 and is nearly square or diamond shape with points vertical. The 

 costal spots are rectangular in shape. 



Polyelirosis slingerlaiidana sp. nov. 



Head pale brown ; palpi same, darker outwardly, thorax same, spi'inkled with 

 dark brown dots, on thoracic tuft the dark brown almost hide the lighter color, 

 except at tips; antennpe pale brown, annulated with dark brown. 



Forewing: — Yellowish brownish-fuscous. Basal patch covering inner fourth 

 of wing, brown, heavily overlaid with dark purplish brown, dark color concen- 

 trated on costa and dorsum at base and outer margin of patch. Patch is defined 

 by narrow yellowish fuscous line, running obliquely from costa to median, then 

 angled sharply downward to dorsum. Beyond this the outer portion of wing is 

 a mottled mass of yellowish fuscous, brown and dark brown scales, with a few 

 grey and white. There is no well-defined pattern as in the grape and lirioden- 

 dron species. Beyond basal patch is an obscurely defined lighter fascia, broken 

 on costa by a geminate central dark spot and a single spot on each side, the upper 

 half of fascia partly overlaid with dark grey and lower half with yellowish fus- 

 cous. On the median line the fascia is interrupted by a horizontal black streak, 

 which continues to end of cell and terminates in a small round dot, two other 

 dots the same size are on the upper side of streak, with the spaces between 

 equally divided. From the outer dot an irregular brown line runs obliquely in- 

 ward, becoming more black than brown when it reaches dorsum at middle. The 

 space enclosed by this line and horizontal streak is dark brown above and lighter 

 below. A dark cloud on dorsum before angle, and between it and brown oblique 

 line are a few scales of grey. Beyond it, before marginal patch, is a much broken 

 band of grey scales from angle to median. Marginal patch large, semi-ovate from 

 costa to angle, touching margin from middle to angle, inner edge nearly straight, 

 wh^re it touches costa it is light brown. Shading into very dark brown to mid- 

 dle and below middle lighter, in the lower half are two small round black spots, 



TKANS. AM. KNT. SOC. XXX. NOVEMBER. 1904. 



