I'AMriiii.iDi: ■riivMF.r.icus brettus. 



1703 



greenish yellow (<J) or pale srayish ( 9 ). Male appendages (37 : 27) with the upper 

 organ havinji the liook c(|ii;il at base, beyond tapering, shorter than the centrum, the tip* 

 bluntly pointed, parallel and sligluly npturueil ; tlie free ends of the lateral arms similar 

 but more pointed and upturned, lyina; directly l)oneath the hooks ; inferior tooth as 

 high as broad and as the heiirlit of tlie liook. Clasps witli a considerable excision just 

 before tlie middle of tlie hmev Ijorder and just beyond the base of the upper, beyond 

 narrowing slightly and sabre-shaped, tlie upper posterior angle, or the point of the 

 sabre, bent inward and profusely covered with minute spines. 



Jleusureuients in millimetres. 

 Length of tongue, 14 nnn. 



Length of fore wing 



antennae 



hind tiliiac and tai".si. 

 fore tibiae and tarsi. 



Described from 12 J , 5 ? . 



Accessory sexual peculiarities. The discal stigma of the male has been described 

 under the wings; tlie scales coutainetl in it consist of jointed threads (50: 1 b), situ- 

 ated in the heart of the stigma, together with spatnlate rods in the same region of 

 varying stoutness, either very slender and with slender spatula (1 d), or much stouter 

 with abrupt and broad spatula (1 c, e) ; at the extreme base are found two-pronged 

 rods (1 f) and large and moderately slender scales (1 g) with convex, waved, apical 

 margin; in the field below the stigma are found some thin, large, triangular scales, 

 finely striate without any waved reflections (1 a). 



Egg. White, smooth, hemispherical. (Chapman.) 



Caterpillar. First stage. Head large, black; thoracic shield black; body white. 

 (Chapman.) 



Third stage ?. Body color greenish white. Length, 13 mm. (After Chapman). 



Last stage. Head oval, rather small, black, roughened with minute granulations, the 

 triangle, two vertical lines on the forehead and the cheeks yellowish white. Thoracic 

 shield black, and, separated from it on either side, a black dot. Body pale glaucous 

 green, with a dark dorsal and an obscure .subdorsal and median line; posterior half of 

 the segments transversely rngulose; spiracles minute, black. Length, 30 mm. (After 

 Chapman.) 



By way of comparison with this description. I venture to append the following from 

 the notes of Dr. Gundlach. describing the caterpillar of the Cuban Thymelicns cos- 

 cinia. which has latterly been regarded by Herricli-Schaefler and Gundlach as identical 

 with brettus, but which I have not ventured to so place : — Head dirty orange, posteriorly 

 ferruginous, ferruginous also on the middle line and, separated by a yellow interval, 

 another ferruginous line parallel to it ; ocelli black ; mandibles blackish. Body yellow 

 greenish white with numerous dark points ; tiie whole covered with white pubescence ; 

 df)rsal thoracic shield and stigma and first pair of legs black; spiracles white. 



Chrysalis. Pubescent, excepting the wing cases; abdomen white, the other parts 

 pale glaucous green ; eyes prominent, with a brownish spot above and a little back ; on 

 either side of head a dark point and a row of dark points along side of abdomen; 

 wing cases smooth, faintly veined; tongue extending in a slender, free, thread-like 

 prolongation to the tail. Length, 19 mm. (After Chapman.) 



The following is a description of the chrysalis of Thymelicns coscinia from the 

 notes of Dr. Gundlach :— Brownish or pale straw colored, with black on certain parts, 

 viz., on the head, excepting the antennae; on the prothorax and mesothorax, except- 

 ing at the outer borders and along the dorsal lino; sometimes on the upper surface of 

 the abdomen and many markings on the shoulder, and sometimes above the legs; an- 

 tennae and wings whiter than the body; the tongue granulated and ferruginous, ex- 

 tending nearly to the blackish cremaster; tlie prothoracic spiracle large, prominent, of 

 a sordid yellow; other spiracles white; the dorsal surface pubescent, the pubescence 

 closer and longer on the eyes and extremities of the body, though there is no pubescence 

 over the ocellar ribbon, wings, legs or antennae. 



