SMERINTHUS. 20 1 



prominent or visible from above ; the palpi thick and short, but 

 equal to the front; the tongue almost as long as the palpi; the 

 antennse usually without the terminal hook, without distinct seta, 

 and about as long as the thorax. Thorax short, almost globose 

 and but little advanced. The abdomen cylindrico-conical, more 

 than twice longer than the thorax. Wings without bristle and 

 hook. The anterior are longer than the body, and about twice as 

 long as broad; the hind margin angulated opposite the post-apical 

 vein and the medio-central, truncate at the tip and excavated be- 

 tween the angles, or denticulated along the hind margin; the 

 inner margin is Deeply concave above the interior angle, which is 

 somewhat prominent. Male, antennae densely ciliferous or sub- 

 pectinated, with the articles produced beneath. Female, antennas 

 simple. 



Larva. The head is semi-oval or pyramidal, with vertex acute. 

 The body granulated, with a caudal horn, and obliquely banded 

 with dorsal thoracic lines on each side. Transformation subter- 

 ranean. The pupa of Group I. smooth and cylindrico-conical, 

 and the position of the larva, when at rest or when disturbed, 

 sphinx like. 



GROUP I. 



Hind wings dilated on the costa at the tip. 

 f Fore wings angulated and excavated on the hind margin. 



1. S. my ops Abbot $- Smith. Smerinthus rosacearum Boisduval. Figured 

 in Sm. Abb. I, pi. 26, Boisd. Sp. Gen. pi. 15. 



Palpi, head and thorax chocolate brown and the two latter por- 

 tions with a purplish or rosy tinge ; the sides of palpi and a stripe 

 in the middle of the thorax tawny yellow. Abdomen brownish 

 luteous, with irregular tawny yellow spots, and the hind portions 

 of the segments dark brown. Anterior wings chocolate brown, 

 with a faint purplish or reddish gray tinge towards the base ; a 

 small blackish spot at the base, between median and sub-median 

 nerves ; an indistinct brownish curved line crosses the basal por- 

 tion of the disk, with a large, median, chocolate brown patch, with 



