LEPIDOPTERA heterocera. 
239 
the disk, whitish along the costa, with a brown discal stripe, with an 
exterior oblique curved whitish band, with a brown apical spot, and 
with a silvery white discal dot. Hind wings brownish, paler and 
with a dark brown streak by the interior angle, fawn-colour along 
the exterior border. Length of the body 16 lines ; of the wings 34 
lines. 
a. North China. From Mr. Stevens’ collection. 
Genus 37. SMERINTHUS. 
Corpus robustum. Caput mediocre aut parvum. Proboscis 
brevissima aut nulla. Palpi breves aut brevissimi. Antennas 
setaceae. Abdomen mediocriter longum. Alae anticae margine ex- 
teriore dentato aut inciso. 
Smerinthus, Latr . Hist. Nat. Ins. iii. 401 ; Curt. ; Steph.; Boisd. 
Sphinx, p., Linn., fyc. 
Merinthus, M eigen. 
Paonias, Mimas, et Polyptychus, Hubn. Verz. Schrnett. 141, 142. 
Colax? Hubn. Verz. Schmett. 141. 
Body robust. Head small or of moderate size. Proboscis 
very short or none. Palpi short or very short. Antennae setaceous. 
Abdomen moderately long. Fore wings with the exterior margin 
dentate or excavated. 
Europe. 
Group 1. 
Proboscis distincta, brevissima. Antennae thorace longiores. 
Pedes breves, validi ; tibiae posticae calcaribus quatuor abbreviatis. 
Alae mediocriter longae et latae ; anticae acuminatae, vix falcatae, 
apud costam subrectae, margine exteriore mediocriter obliquo con- 
cavo subangulato; posticae subtruncatae, subrotundatae. 
Proboscis distinct, very short. Antennae longer than the tho- 
rax. Legs short, stout ; hind tibiae with four short spurs. Wings 
moderately long and broad. Fore wings acuminated, hardly 
falcate, nearly straight in front ; exterior border moderately ob- 
lique, slightly concave for near three-fourths of its length, when it 
forms a very obtuse angle, and is slightly concave from thence to 
the interior angle; interior border slightly concave towards the tip. 
Hind wings with the costa slightly convex towards the tip, which is 
somewhat truncated and rounded. 
