( 423 ) 



than in c?, as is also the case in riscus, the yolh)\v abdominal margin of ? almost 

 separated from the yellow anterior area. 



S. Tenth ahdoniiual segment (PI. XLIl. f. ]()) eery broad, the lobes strongly 

 curving downwards ; tcrgite cnrving downwards and inwards, narrowing to ajuix 

 in side-view (1*1. XLlI. f 11), twisted, not ])ointed ; lobes of sternite projecting 

 vertically ventrad and tlien cnrving evenly distad, liorn-shaped, dilated at base, 

 tlie dilated ])art carinate on the inner surface, the hook finely channelled. Harjie 

 (PI. XLVII. f. 3) produced into a slender, tapering process. Penis-sheath (PI. LIU. 

 f. 41) without whip, ending in a slightly curved, conical, pointed, not movable 

 process ; no teeth. Penis-funnel without armature. 



?. Vaginal })late rounded triangular ; orifice open, the edges raised. 



Hah. Peru ; Bolivia ; probably of wider distriliution. 



In tlie Tring Museum 2 S 6 , 1 ? from: Kio Oacliyaco, Prov. Iquitos, Peru 

 {type ; Stuart) ; Bolivia (Garlepp). 



OVI. PERIGONIA.— Typns : stidta. 



Splihi.,; Fabricius (iion Liunu, 1758), Gen. Ins. p. 272 (1777). 



Pt'i-irjiJiiia Herrich-Sch., Aiissereur-Schni. i. (18.54) (num. itidescr. !) ; Walk., List Lej>. ///<. /?. .V. 



viii. p. ItiO (1850) (partim ; type : lu.'ica Walk, partim = xfulht U.S.) ; Boisd., Sjii;: (;,-,i. Leji. 



lift. i. p. 320 (187.')) (partim). 

 M(irr<ii/!iis.'iii.^ Lucas, in Sagra, llisl. Cuba vii. p. 281) (1850). 

 iSte/iolojtliia Felder, Heine Nooani, Lep. t. 82 (1874) (nom. inde-icr. !). 

 Piicli)j!/nti!a, Burmeister {/ion Butler, 1877), Desn: Rep. Argent, v. p. 350 (187H). 



i ? . Palpi prominent, rounded in dorsal and in lateral view. Scaling raised to 

 a crest on occiput, the crest divided anteriorly in perfect specimens. Antenna 

 slender, not incrassate distally, hook rather short and abruptly curved, end- 

 segment individually variable in length, equalling one, two, or three previous 

 segments. Spines at edges of abdominal segments strong, arranged in three or 

 four rows, the proximal spines longer than broad ; sixth sternite of ? transverse, 

 entire apical edge spiiiose, mesially slightly concave ; anal tuft truncate iu ? , 

 bisinuate, with the narrow mesial part prolonged in c?. Legs normally scaled; 

 midtarsus with comb. Forewing pointed, discal edge convex in middle. SO^ and 

 H' of hindwing from upper angle of cell, 11^ and M' close together, D^ very oblique, 

 lower angle of cell shar])ly acuminate. 



S. Tenth segment of the same type as in Sesia, the tergite and sternite being 

 divided each into two lobes (PI. XLIL f. 12—15). Clasper long, narrow, curving 

 upwards, apex obtuse ; harpe short ; a small ridge above its base, bearing short, 

 stout, curved spines (PI. XLV^II. f. 4. 5.6) ; 7io friction-scales on outer side. Penis- 

 sheath ending in a whip of variable length, armed with short tooth-like spines, 

 similar spines on the sheath near the base of the whip (PL LIV. f. 6. 7). 



Early stages not known. 



Hab. Troi)ical and Subtropical America : Bahamas to Buenos Ayres northward 

 into the United States. 



Eight species. 



Key to the species : 



a. Yellow area of hindwing extended to base . . . b. 

 Yellow area of hindwing not extended to 



base, or hi/idwing without yellow band . . . d. 



