174 LEPIDOPTERA OF NORTH AMERICA. 



large black spot on the inner margin near the base; discal spot 

 small and black ; a single broivnisk line from the inner margin to 

 the tip; with two rows of indistinct brownish dots on the nervules 

 before it, and a more decided row behind, near the posterior mar- 

 gin. . Posterior wings black, with a row of central, pale testaceous, 

 triangular spots, and a narrow terminal border of the same hue. 



Under surface of the wings, disk of the anterior blackish, and 

 thence rufescent brown; posterior wings rufescent brown, with two 

 lines of dark brown, dots. 



Mexico. 



CLEMENS. 



Hind border of anterior wings nearly straight. 

 7. C. versuta Clemens. 



Head and thorax brown. Abdomen brown, with black rings 

 between the basal segments and a black spot on each side of the 

 basal segment. Anterior wings brown with a faint wavy line and 

 narrow band across the middle of the disk, somewhat deeper brown; 

 discal spot small and dark brown ; an oblique brownish band ex- 

 tending from the origin of subcosto-inferior vein toward the inner 

 angle, followed by two short lines of the same hue; a blackish- 

 brown, irregular, wavy line, extending from the costa near the ori- 

 gin of the post-apical vein to inner margin above the angle, and 

 another of the same hue joining it by an angle on the disco-central 

 vein, and extended very irregularly from near the tip to the inner 

 angle, and -shaded toward the hind margin of the wing with dark 

 brownish. Posterior wings dark brown, dull greenish at the base, 

 with an irregular, central, luteous band, tinged with orange. 



Mexico. 



CLEMENS. 



AMBULYX BOISD. 



Body rather slender or hardly stout. Head prominent, conical, 

 obtuse. Proboscis long. Antennas minutely serrated. Abdomen 

 long, oblanceolate. Legs slender; hind tibiae with four very long 

 spurs. Wings narrow and very long, especially in the typical spe- 

 cies, A. strigilis. Fore wings slightly curved in front toward the 

 tips, which are acuminated ; exterior border excavated by the tip, 

 nearly straight, and extremely oblique from thence to the interior 





