138 



from the remainder of the segment by a distinct carinate 

 ridge. \8merintlius Latreille. 



\Paonias Hiibner. 

 dd. Maxillae half the length of the wings ; average length of 

 maxillae at meson 10 mm., sometimes exceeding this length; 

 dorsal cephalic margin of abdominal segments 5-7 .punc- 

 tate, the punctures somewhat scattered and not presenting 

 a honeycombed appearance ; cephalic margin never sep- 

 arated from the remainder of the segment by a distinct 



ridge Marumha Moore. 



aa. Spiracular furrows never present on all of the movable segments, 

 b. Spiracular furrows present on either one or two of the movable 

 segments. 

 c. Cephalic margin of abdominal segments 5 and 6 with three or 

 four furrows over each spiracle, the furrows separated by 

 sharply carinate ridges and extending almost to the meson on 

 both dorsal and ventral surfaces ; cremaster sparsely covered 

 with short curved spines on the dorsal and lateral aspects. 



Hemaris Dalman. 

 cc. Cephalic margin of fifth abdominal segment with three or more 

 shallow furrows over each spiracle, which never extend on to 

 the dorsal and ventral surfaces; cremaster never with short 

 curved spines on any portion ; labrum always on the dorsal 

 surface of the head, 

 d. Prothoracic femora apparent. 



e. Mandibular area always elevated and usually forming prom- 

 inent tubercles;. cephalic margin of fifth abdominal segment 

 with one ental furrow over each spiracle, extending for the 

 entire width of the lateral aspect, and five or six interrupted 

 ectal furrows with interrupted carinate ridges between ; 

 body surface dull ; color light brown or coffee-color with 



darker markings Deilepliila Ochsenhcimer. 



ee. Mandibular area never elevated; cephalic margin of fifth 

 abdominal segment with either three or four entire fur- 

 rows over each spiracle; body surface highly polished; 

 color black with red markings ; abdominal segments finely 

 punctate on the cephalic half. . . .Dilophonota Burmeister. 

 dd. Prothoracic femora never apparent; cephalic margin 'of fifth 

 abdominal segment with six or more interrupted furrows 

 with short, more or less wavy interrupted ridges between; 

 cephalic portion of maxillae slightly excurved and almost 

 carinate on the meson ; abdominal segments punctate over 



the entire length Therefrd Hiibner. 



bb. Spiracular furrows never present on any of the movable abdom- 

 inal segments. 

 c. Pupae always less than two inches in length ; labrum usually at 

 the cephalic end of the body but never on the dorsal surface. 



