454 



ERYCINID^. 



TnoRAX moderately robust, finely hairy. i , ^ -x ■ i 



Fore Wings sJbtriangular, entire: Costal margin but slightly arched, except towards the extremity; apcal 

 ancrle rather obtute. Apical margin moderately convex ; hinder angle rounded. Inner margin generallj^ 

 straio-ht or dilated and convex. Postcostal vein with four branches in the majority of the species; the tirst 

 and second branches arising before the anterior extremity of the discoidal cell; the third at a considerable 

 distance beyond the cell of the fourth, almost at the apex of the wing; the terminal portion of the postcostal 

 vein extending below the tip of the wing. Upper disco-cellular vein generally obsolete ; middle one arising at a 

 short distance beyond the second branch of the postcostal, arched, transverse : lower disco-cellular rather longer, 

 slender, the tip directed more towards the apical margin of the wing, uniting with the third branch ot the 

 median vein at a short distance beyond its origin. Upper discoidal vein arising simultaneously with the 



nh!d 'ir/mrtubovate' entire along the outer margin; anal angle rounded. Costal vein very short, scarcely 

 reachino beyond one fourth or one third of the length of the costa. Postcostal vein arising nearer the body 

 than the precostal, curved at its base, so that its longitudinal portion extends from opposite the precostal vem. 

 Precostal straight, porrected obliquely into the angulated base of the wing. Postcostal branching at a 

 moderate distance from the base. Upper disco- cellular vein arising at a distance about equal to one third ot 

 the space between the branch of the postcostal and the base of the wing: lower disco-cellular longer but more 

 slender and oblique, unitin- with the third branch of tlie median vein at a moderat.2 distance from its base 



Fore Legs of the male minute; thickly clothed with long silky hairs. Fore Lefjs of the female about three times 

 the length of those of the males, scaly. Tarsus equal in length to the tibia, rather dilated m the middle; 

 intermediate joints with one or more strong spines at the extremity beneath. Ungues and appendages very 



FourHM Legs rather short, scaly. Tibial rather dilated in the middle, almost destitute beneath, as well as the 

 tarsi, of minute spines. Ungues and appendages minute. 

 Abdomen elongate and slender in both sexes. 



In addition to the well marked distinctions which the numerous insects of this genus possess in the central black sjiot (bearing several 

 minute white points) in the middle of the fore wings, they are separated from most of the adjacent genera by then- ^°f >;'^?^"->. ^^^^^^^^J 

 the four-branching postcostal vein of the fore wings. Tbe wings, and more cspec.ally the posterior pair, are more or less fa^c.a ed w. h 

 lark .treaks runnini across them, and the females are generally much duller in their colours than the opposite sex Tl e chaiactei 

 gn above are those of the great'cr number of the species, but there are several other insects winch agree with the -^^" * -'• f °<^- 

 appearance and markings, but which exhibit several interesting peculiarities in their details. Thus Mes. Crcosus (<^^^f3 J;-) ^^^^ 

 the fore win<.s in the .miles dilated along the inner margin, whilst the costal margin of the hind wings is dilated semicirculaily at its 

 base, and not only the costal but both branches of the postcostal and the discoidal run into the costal ">=»-g;" ', »_'7^;::;;' •';^ .^'l'^^^ 

 same individuals the fore legs are so exceedingly minute as to be scarcely perceptible, with the tibia short and almost o^a and the 

 a"us short and conical. Mes. Idotea, Lasus, and tenera have only three branches to the postcostal vem the upper ^l-o-cel ular vem 

 bein- present in consequence of the discoidal cell being extended further longitudinally, especially in the last-named species i he 

 malel of these species are also remarkable on account of the extreme minuteness of the fore legs. M. Idotea m Us "^=;'-^;"g J^.f 

 strong resemblance to many of the other species ; but M. Lasus and tenera have the discoidal spot considerably beyond the middle ot 

 the \\mgs, which arc marked with several delicate waved pale lines. 



MESOSEMIA. 



Section I. Fore Wiiiys with fiinr branches to the Postcostal Vein. 



* Fore Legs of the male of small si:e. Hind Wings not dilated along the 



costa. 



1. Mes. FORMOSA. 



Mesosemia formosa Heuits. MS. \ ; Douhl. Westw. S^ 

 Hewits. Gen. D. Lep. pi. 71. f- 5. (nee 6'.). 

 Amazon. Col. Hewitson. 



2. Mes. Sifia. 



Diophthalma Sifia lioisduval, Sp. gen. T.cp. pi. fi. f. <). 

 Brazil. 



3. Mes. Gneris. 



Diophthalma Gneris lioisduval MS. 



Mesosemia Gneris E. Douhl. List Lep. Brit. Mas. pt. 2. 



p. 13.; Douhl. Westw. ^S Hewits. Gen. D. Lep. pi. 71. 

 f. 6. (nee 5.). 

 Cayenne. 



B. M. 



i. Mes. Ui.riccs. _ 



Papilio Ulricus Fubricins, Mant. Ins. ii. p. 82. n (3.>. 

 (male), Ent. Sijst. m. pt. 1. p. 314. n. 187. ; Cramer, 

 Pap. pi. 100. f. E. F. ; Godnrt, Enc. M. ix. p. .'583. 

 n. gi. (Erycina Ul.). 

 Papilio Uiricella Herbst, Pap. pi. 231. f. 6, 7. 

 Mesosemia Ultio Hiibner, Verz. belt. Sehm. p. 21. n. 147- 

 Surinam. 



(j Mes Titea. 



Papilio Titea Stall, Suj^l. Cram. pi. .'5. f. 6. and fi G. 

 Erycina Tisis Godart, Enc. M. ix. p. .583. n. 90. 

 Surinam. 



+ " Upper side. Anterior wing light brown ; the base, except the costal margin, light bhie. In the cell is "lack eye ,th pup o wh^e ai d b twe n .t 

 and the outer margin five belts of "black, the first of which passes round the eye ; the fourth is much broader han th rc.t. "f ^ "^^""S^' " ;\; "^j, ^'^^ 

 two short lines of black upon the upper margin, succeeded by a straight belt and two m.arg.nal belts of black.-t mler sule light brown. Anttnor win, 

 above, without the blue. Posterior wing with ihe base and nine belts of dirty white. Exp. 1 mch. —Hewttson MS. 



