118 



MEMOIRS OF THE NATIOXAL ACADEMY OF SCIENCES. 



Fig. 58.— Head aud tborax of pupa of D. perspiaia, 

 seen from above, c, eye; v.\ first pair; it'", second 

 pair of wiii;;s: ah', lirst alKlominal seyiueut. 



diffuse and spreading'. Apical streak unusually long and di.stinct. The tliree branches of tbe 

 median vein are outlined distinctly in brown, and tliere is a faiut sliadiny of this color along- 

 internal niargiu centrally, lliud wings very pale buff (E., Y, 13), but nuicli jialer, without dark 



shades; underside as hind wings above, the outer edge of 

 primaries darker, with the fringe dark brown, as above. 

 Exi^ause of wings, 47-5.'5 mm. 



A very distiuct species with only one close ally, namely, 

 D. rohiistd Strecker. It differs from all the other species in 

 its bright yellow color. (Dyar.) 



Efjg. — "In general shape subpyriform; flattened at base 

 and top, depressed centrally at vertex, the usual black spot 

 small and indistinct, situated at the bottom of the puncti 

 form depression ; the whole surface punctured. Color, white; 

 the lid like top of a somewhat brighter white. AYidth, 0.9 

 mm.; height, 0.8 mm. The egg is of the type of that of D. 

 major, but resembles that of T). miiiiatra in coloration, by 

 possessing a discolorous lid like top. This is the part of the 

 shell eaten by the young larva iu liatching. Laid in masses 

 of varying numbers on the underside of the leaves of the 

 food plant." (Dyar.) 



Lurvd, Stage I. — '■Length near the end of the stage, 

 about r> mm. When first hatchod the liead is black, 0.."> mm. wide; the body is yellowish, with a 

 reddish dorsal and subiloisal line, not reaching the extremities: 

 cervical shield, feet, and anal plate black. As the stage ad- 

 vances, the body becomes reddish, with four lateral yellow 

 stripes on each side and three ventral, as in its allies, which 

 remain throughout the larval stages. They are nearly as wide 

 as the intervening lateral spaces, a little confluent posteriorly, 

 and are colored yellow. Black hairs arise from small black 

 tubercles and from the elevated anal feet." (Dyar.) 



Larra, Stage II. — " Head higher than wide, .slightly punc- 

 tured, black; width, 1.1 mm. Body parts colored as before. 

 The hair is short, blackish, and arises from minute tubercles 

 that are much smaller than in the previous stage." (Dyar.) 



Larra, Stage III. — "Head shiny black, punctured, the cly- 

 pens smooth; width, l.C-l.S mm. Cervical shield, anal plate, 



and thoracic feet black. Body dark red, the stripes br(jader than the intervening spaces, bright 

 yellow: abdominal feet red, the anal pair black. A few short hairs; spiracles small, black." (Djar.) 



Tlie specimens described below were received Au- 

 gust 2;?, from Mr. James Angus, and so named by him. 



Larva, Stage III or IVL — Length, 17 mm. The 

 head is black, not quite so wide as the body. A shining 

 black chitinous transversely oblong prothoracic shield. 

 The body is moderately hairy, the hairs reddish : it is 

 deep straw or lemon j-ellow, with eleven pitchy reddish 

 lines; the median dorsal line is much broader than any 

 of the others and broader than the spiracuhir line: of 

 the two subdorsal lines, the upper is a little wider tlian 

 the lower; the lowestbriufraspiracular line is interrupted 

 by the sutures: the two ventral lines of the same reddish 

 color pass along at and including the base of the thoracic 

 and abdominal legs. The suranal jilate is small, shining black. The anal legs are conical, black, 

 except the reddish planta, which is distinctly eversible, being seen at times to be retracted, 

 though armed with hooks. The two paranal plates are dark at the end; the end of the body is 

 ■constantly uidield. The thoracic and abdominal legs are black. 



Fig. go. — Pupa of Datana per^j^iata. End 

 of alulomeii, .sbowiiijr the vestiplea of Uieniale 

 irenital outlet, of the anal leg^, and the ere- 

 uiaster. 



Fig. 59. — Pnpaof Datana 2>erspicx<a. underBiHe o{ heai\. 



