1918] PiipcB of Common Sphingidce 417 



This genus, as defined here, consists of a single species, 

 D. catalpcE, the catalpa sphinx, which is a common pest wherever 

 these trees are found. The larvae enter the soil to pupate. 



Daremma catalpae Grt. (Fig. 4). 



Color yellowish to chestnut brown; head and thorax with fine 

 indeterminate transverse striations, these practically absent from the 

 abdomen which shows fine scattered punctures on the first seven seg- 

 ments, more numerous on the cephalic half and on the remaining 

 segments; annulets usually distinct on the first three abdominal seg- 

 ments; each abdominal segment usually shows some fine longitudinal 

 furrows on the dorso-meson at the cephalic margin; maxillae five- 

 sevenths of the length of the wings, ending just beyond the mesothoracic 

 legs; proleg scars very prominent on the venter, usually depressed 

 rounded areas; metathorax with a slightly curved transverse furrow in 

 the middle of the segment on each side of the slightly elevated median 

 line ; scar of caudal horn slightly elevated and punctate like the remain- 

 der of the segment, usually having a prominent depressed area just 

 caudad of the elevation; cremaster about 2 mm. long, .finely rugose, 

 usually bluntly pointed at tip, sometimes bifurcate. Length 30-35 

 mm. ; greatest width 8-9 mm. 



This species seems to be fairly constant in its characters and 

 not so variable as either of the species of Ceratomia. 



Genus Atreus Grt. 



This genus is said by Rothschild and Jordan to be "an off- 

 shoot from Protoparce, or rather from a form (not yet discov- 

 ered, or extinct) connecting Protoparce with Hyloicus (Sphinx)." 

 A study of the pupa shows it to be indeed closely connected 

 with the two genera above mentioned. It is separated from 

 Protoparce by the flat maxillary loop, which never arches from 

 the surface of the body, and from Sphinx by the presence of a 

 single spiracular furrow. The characters separating it from 

 Sphinx are practically the same as those separating Daremma 

 from Ceratomia. The body is typically sphingiform with the 

 labrum at the cephalic end. The labrum is very rugose and has 

 a row of four small tubercles adjacent to the maxillae, the two 

 mesal ones being more prominent and easily visible at the end of 

 the body in cephalic and lateral views. The maxillary loop is 

 closely appressed to the ventral surface of the body, and reaches 

 slightly more than half way to the caudal margin of the wings. 

 The movable segments have one deep pocket-like spiracular 

 furrow. The cremaster is somewhat triangular, longer than 

 broad and ends in a sharp point. 



The genus includes a single species, A. plebeja. 



