( 378 ) 



ontside. Penis-sheatli (PI. LIII. f. 10) with an obtuse straight apical process, 

 which bears a row of teeth at the left edge, the row generally double proximall}'. 



? . Eighth tergite rounded-siunate, the lobes strongly rounded. Vaginal plate 

 (PI. XL. f. 17) rather large, apical edge membranaceous, a deep halfmoon-shaped 

 jiroximal cavity, surrounded proximally by a smooth ridge ; vaginal orifice post- 

 median, small, covered by a heart-shaped bilobate flap. Seventh sfernite long 

 trapeziform, apex membranaceous. 



Larva resembling that of Jiciis, but smaller. 



IlaL Florida, AVest Lidies, southward to Buenos Ayres ; common in collections. 



In the Tring Museum 00-odd specimens from : Florida, various places of 

 Central and South America, southward to Bolivia, Paraguay, Parana (Brazil). 



XCIIL ORYBA.-Typus : achcmrvirks. 



Sphinx, Cramer (timt Linm', 1758), Pap. Exul. iii. p. bZ (1779). 



Clanis Hiibner, Virs. bek. Schm. p. 138 (1822) (partim ; type ; jihiluris = nicoharenslK). 

 Pachylia Walker, Lht Lep. Ins. B. M. viii. p. 191 (18.')6) (partim ; type : ,/?««). 

 Orybit id., I.e. p. 197 (1856) (type : arhenieni(lex = robiislii). 



c??. Eye very large, not lashed, diameter about one and a half times the 

 width of the frons. Palpus slender, smooth-scaled, closely appressed to head, 

 pointed, not projecting, outline iu side-view following the curve of the head. 

 Antenna distinctly clubbed, end-segment very long, filiform, exce])t at base, 

 penultimate segment shorter than vertically broad. Abdominal spines heavy, in 

 one row, long and .short ones alternating on posterior tergites, contiguous, the 

 spines of the sternites also very stiff; seventh sternite of ¥ broadly trape/iform, 

 without spines. Blerum of midcoxa angnlate. Tarsi short-scaled, long ; midtarsns 

 without comb. Distal margins of wings entire ; apex of forewing acute ; R of 

 hindwing before centre of cell, hinder angle of cell acuminate, R^ and M' rather 

 close together, D* being only one-fifth to one-third the length of D^. 



<S. Seriated ciliae of antenna very short. Scent-organ of forecoxa largo or 

 small. Tenth segment divided, of the same type as in PscHclosphiiix, racln/lia, 

 Ei'inmjis, etc. ; the lobes of the broad tergite (PI. XLII. f. 2. 3) broad, about half 

 the length of the segment, the sinus between them wide, rounded ; sternite with 

 two long and slender processes {Xv), which are pointed and distally curved. 

 Clasper very large. Penis-sheath (PI. LIIL f. 13. 14) forked, with apical sense 

 hairs and short tooth-like spines resembling those found in Xi/ceri/x, Perigonia, 

 etc. ; penis-funnel produced into a long, more or less clubbed process, which is 

 denticulate on the upperside. 



?. Vaginal plate triangular; orifice proximal .tikI mesial; no obvious arma- 

 ture. Eighth tergite membranaceous mesially from apex to near base. 

 Early stages not known. 



Hab. Central and South America, from Honduras to Bolivia and Southern 

 Brazil, extending probably to Mexico. 

 Two species : 



Distal marginal area of forewing as broad at 

 R^ as the interspace between this area and 

 the first discal line (ontside cell) . . 306. 0. kadeni. 

 Distal marginal area very much narrower than 



that interspace 307. 0. achemenides. 



