LEPIDOPTERA HETEROCERA. 75 



exteriore perobliquo. Mas. — Antennae sat late pectinatae. Fcem. — 

 Antennae simplices. 



Sphinx adscita, p., Cramer. 

 Thyretes, Boisd. MSS. 



Body rather long and slender. Head and thorax pilose. 

 Proboscis short. Palpi short, slender; third joint lanceolate. An- 

 tennae much more than half the length of the body. Abdomen 

 pubescent, extending for half its length beyond the hind wings. 

 Legs rather long; hind tibiae with two minute apical spurs. Wings 

 long and narrow, partly limpid. Fore wings straight along the 

 costa, rounded at the tips; exterior border very oblique ; second in- 

 ferior vein as far from the third as from the first ; third more than 

 four times further from the fourth than from the second. Male. — 

 Antennae moderately deeply pectinated. Female.— Antennae simple. 



1. Thyretes Hippotes. 



Alba; thorax f us co bivittatus aut disco fusco ; abdomen e maculis 

 luteis bivittatum ; alee anticce fuscce, vitta discali maculari 

 limpida ; posticce limpidce, margine interrupte fusco. 



Sphinx adscita Hippotes, Cram. Pap. Exot. iii. 166, pi. 286, f. A. 



a, b. South Africa. From Mr. Argent's collection. 



c. South Africa. From M. Becker's collection. 



d. Port Natal. From M. Gueinzius' collection. 



e. Cape. From M. Drege's collection. 



/. Port Natal. From Dr. Krauss' collection. 



Genus 15. AENA. 



Mas et fcem. Corpus gracillimum. Proboscis brevis. Palpi 

 breves, graciles, caput vix superantes. Antennae setaceae, simplices, 

 gracillimae, thorace duplo longiores. Abdomen alas posticas dimidio 

 superans. Pedes longiusculi, gracillimi; tibiae posticae calcaribus 

 quatuor longis. Alae angustae, maculis vitreis ; anticae apud cos- 

 tain rectae, apice rotundatae, margine exteriore perobliquo. Mas. — 

 Abdomen apice fasciculatum. 



Male and female. Body very slender. Proboscis short. 

 Palpi short, slender, hardly extending beyond the head. Antennas 

 setaceous, simple, very slender, full twice the length of the thorax. 

 Abdomen extending for about half its length beyond the hind wings. 

 Legs rather long, very slender ; hind tibiae with four long spurs. 



H2 



