( 54 ) 



I'lipa known of three si)eci('s : 



II. Toni;ue-C!isc sjiirally i'oIKmI n|i . . . ('. rlnfiitias. 



Ton,i;"iu'-(uise not. sjiira.lly inllcii up . . . . b. 

 l>. Alitloiucn witlioiit, i)atrli (if (ulifrclcs ii|j()ii 



segment n c, ilii/Kinrliel. 



AlKlomcn willi a rouuli ))al(!i oi' tiilnTcles 



npiin lln' Mil sc^nicnt .... ('. luituriis. 



;'.]. Cocytius cluentius. 



Merian, Ins. Surinam, t. 3 (1705) (larva, pii|)a). 



S/ilihi.!- cliieuHnn Cramer, Pap. K.i\ i. p. 124. t. 7S. f. is (177;')) (Iiul. occ.) ; id., l.r. ii. p. 43. t. 1-2G. 



f. A (1777) (Surinam) ; Goeze, Ent. lieytr. iii. 1. p. 21 D. n. 5;i (1779). 

 Phlegethontius cliu-nlhix, Hiibner, Verz. heh. Hchm. p. 140. n. l.OUO (1822). 

 Amphon!i.c dui'iiliiis, Pocy, Coif. Lip. p. 4 (1832) ; Mi'ni'>tr., Eiium. Cnrp. Aiiim. Mii.'i. Pifr., Lip. 



p. 90. n. 1488 (18.")7) (Haiti) ; (hote & Rob., Proc. Ent. Sue. Phihul. v. p. (i7 (18G5) : id.. I.e. 



vi. p. 329 (18(.G); Boisd., Spc: Gi-n. Lip. HH. i. p. G2. n. 1 (1875) (Cayenne; Antilles; 



cii. faha) ; Miischl., Veih. Zonl. Bot. Ges. Wkn x.wi. p. 345 (187G) (Surinam) ; Dew., Mitth. 



Mtincli. Ent. Ver. i. p. 92 (1877) (Porto Eico) ; Butl., Trans. Zool. Soc. Land. ix. p. GUO. n. G 



(1877) (Brazil ; R. Janeiro ; Haiti) ; Burm., Dewr. Hep. Arg. v. p. 31G (1878) (partim ; caterp. 



ihatoi P.iilhqihiijn); Butl., Pnu: Zoo!. Soc. Limd. p. 483. n. 56 (1878) (Jamaica) ; Gundl., 



Coiilr. Ent. Cuhmia p. 205 (1881) (Cuba) ; Druce, Biohg. C'enlr. Amer., Lrp. Hct. i. p. 18. n. 4 



(1881) (Cbiriqui) ; Edw., PupUio iv. p. 12 (1884) (Vera Cruz) ; Pitt. & Bioll., Lep. Iht. Ci:<:ta 



Pica p. 11 (1897). 

 Macrosila cluentius, Walker, List Lip. Ins. B. M. viii. p. 200. n. 3 (185G) (Brazil ; Rio de Janeiro ; 



St. Domiogo ; Surinam) ; Herr.-Sch., Corresp. Bl. p. 59 (18C5) (Cuba). 

 Cocytius cluentius, Kirby, Cat. Lep. Ilet. i. p. G87. n. 10 (1892) (S. Amer. ; Antilles) ; Bothsch., 



Nov. Zool. i. p. 541 (1894) (Ai-oa) ; Bonningh., Iris xii. p. 114. n. 13 (1899) (Rio de Janeiro). 



S ?. Tlie pattern of the forewing reminds one o^ Bilophonota ; cellules R^ — M^ 

 almost normally scaled, the mnltidentate scales being dense also near cell ; the 

 disc of the hindwing lias no transjiarent spaces, the modification of the scales 

 to hairs not being completed on either side ; the scales of the upjierside much 

 narrower than those of the underside. Legs slenderer than la the other species 

 of Coct/tius. Scaling of jironotum prolonged to two tufts or crests ; mesial tufts of 

 abdomen seldom distinct, represented by vestigial short carinae. Base of hindwing 

 black ; yellow subbasal area completely separated into three jiatches. 



S. Foretibia as long as, midtibia about 1 mm., and hindtibia about 2 mm. 

 longer than, the respective first tarsal segment. Foretarsus with comb on segments 

 3 to 5, segments 1 and 2 with one internal row of spines, which is more or less 

 incomplete ; the external row of segment 2 is irregular, the apical spine prohinged ; 

 the other segments have very few spines, mostly apical, rejiresenting rows 1, 2, 4, 

 first segment nearly twice as long as the second, segments 2 to 5 together half as 

 long again as the first. i'lasi)er comparatively small for a species of this genus ; 

 harpe with a flat, rather short, obliquely rounded, process (PI. XXXVII. f. 8), which 

 is densely hairy at npper apical margin and bears on the external side (towards the 

 clasper) a series of sharp, recurved, marginal teeth (PI. XXXVII. f. 9) ; above 

 the base of the harpe there is a strongly chitinised fold which is clothed with long 

 and more or less horizontal bristles. The penis-funnel is prolonged (PI. XXXVII. 

 f. 8), somewhat bone-sliaj)ed in a lateral view, dilated and truncate at end, ventrally 

 open, this opening elongate lyre-shaped ; the penis-sheatii is very slender and 

 a.]iically produced into an obtnse flat lobe which appears pointed in a side-view, 

 and is gently curved : no teetli. Tentli tergite (PI. XXVII. f. 35) comparatively 



