HE.SPKRII)I: HESPERIA MONTIVAGA. 



1539 



Abdomen blarkish brown on the upper half, the extreme apical edge of the segments 

 marked witli white especially on the sides ; 1)cncath wliitcs tinged on the sides with 

 greenish yellow, the apical segment wholly greenish yellow below, the black hairs of 

 the upper surface yellow-tipped. Upper organ of male appendages (35 : 30, 40) with 

 the liook regularly triangular, half as long again as broad and as long as the centrum, 

 straight, depressed, laminate, nearly horizontal, carinate along the middle; lateralarms 

 almost entirely similar, parallel and distant, extending quite as far back. Clasps two 

 and a half times longer than broad, equal on the basal half, rapidly narrowing by the 

 excision of the upper border in the nest quarter, thus forming the somewhat angnlated 

 upper lobe, and beyond directed abruptly upward and forward, terminating higher than 

 the upper lobe in two triangular pointed teeth, the posterior the larger, formed by the 

 angular excision of the extremity. 



Described from 27 i , 18 9 . 



Accessory sexual peculiarities. The costal fold of the fore wing of the male 

 contains some flagellate androconia which are moderately stout, equal at base, taper 

 only near apex and terminate in a flagellum nearly as long as the lamina(48 : 4 a) ; the 

 otherandroconiaarelongovalwithparaUelsides,of two lengths but similar widths, some 

 as long as the flagellate scale with its flagellum, or about .16 mm. long (4 b), some 

 smaller than the lamina of the same (4 c), or about ,06 mm. in length; the cover 

 scales are very large, irregularly oval (4 d). 



Egg. Nearly spherical, flattened at base, with twenty-four prominent vertical ridges 

 radiating from the summit. Color white, with n.acreous reflections; width, .5 mm. 

 After a description received from Prof. E. A. Popenoe. 



Caterpillar. Last stage (77 -.U, 17). Head (88:45) uniform piceous, the glisten- 

 ing color subdued by the dense, short pile which consists of compound, branching, 

 pallid, more or less infuscated, brownish hairs arising from the centre of one of the 

 pits with which the surface is uniformly studded. 



Body presumably green in life, of a pale testaceous color in blown specimens ; all 

 but the incisures and the papillae more or less infuscated, excepting along certain defi- 

 nite longitudinal lines, the papillae themselves being of the lightest color of the body, 

 like the incisures. The longitudinal markings are as follows: a small, dusky spot, 

 probably dark green in life, at the extreme anterior edge of the dorsal line, encroaching 

 on the incisures on all the segments, but more marked in advance of the third abdomi- 

 nal segment than behind it ; a faint, dusky, subcontinuous, dorsal line is thereby intensi- 

 fied, but on the largest segments is itself cut by a longitudinal, paler thread ; the 

 moderately broad, dark, lateral stripe running the whole length of the body, made much 

 more conspicuous by being narrowly edged by supralateral and infralateral p.ale lines, 

 the lower of which margins, as well, an interrupted laterostigmatal dark band, similar 

 to, but far less continuous and conspicuous than the lateral band ; a whitish, interrupted, 

 ventrostigmatal stripe, most conspicuous on tlie apodal abdominal segments and 

 especially at the anterior and posterior extremities of the segments, between which it 

 is sometimes interrupted and where it sometimes widens into spots ; first thoracic seg- 

 ment reddish brown, probably dark luteous In life, margined posteriorly with a 

 moderately narrow band of black and infuscated anteriorly, the infuscation broken 

 irregularly by pale yellowish along the median line ; surface of the body finely and 

 closely punctate. The first two pairs of legs and claws blackish fuscous ; posterior 

 pair of legs and prolegs concolorous with the under surface. Spiracles luteous ; supra- 

 lateral, crateriform annuli testaceous in a pallid spot, entirely similar to those in which 

 the papillae are situated. Length, 15 mm. ; breadth of second thoracic segment, 



