( 109 ) 



Cemtoinia catalpin; Suaith, Trails. Ainn: Ent. Soc. xv. p. 205. t. 10. f. 9. 10 (genit.) (1888) (Florida 

 to Virginia, Mississippi, Indiana) ; .Tones, Eiil. iWw.f x. p. 43 (1899) (Delaware, spreading 

 northward?) ; Laur., ih/il. x. p. 190 (1899) (Delaware, abund. of pupa); id., ?.<;. xi. p 608 

 (1900) (spreading northw.). 



c??. First segment of foretarsns a little longer than second; long termitiiil 

 spur of hindtibiae less than two-thirds the length of the first tarsal segment. 

 Markings in basal half of forewing less distinct than in itndulosa, stigma smaller, 

 bands on underside of hindwing less marked, the outer one not dentate ; collar not 

 edged yellow buff, brown lateral patciies of abdomen smaller. The fringe-spots are 

 variable in size. 



S. Tenth abdominal segment not quite sjanmetrical — the asymmetry is not 

 conspicnons, — tergite less dilated vertically before endt han in undulosa ; sternite 

 shorter, the lobe broader than long, sinuate, the right half truncate, the left 

 rounded. Clasper small, narrow, broadest just before end ; harpe sliort, broad, 

 almost oblong, somewhat narrowing to end, sinuate at apex, the ventral lobe sliorter 

 than the upper one, upper margin slanting, dentate (PI. XL. f. 1). Penis-siieath 

 with a very long, conical, horizontally curved, apical tooth (PI. XXIX. f. 2. 3). 



?. Vaginal plate resembling that of Isogramma hagein, but the ridge covering 

 the vaginal cavity thicker and less distinctly sinuate. 



Southern specimens seem to be duller in colour and less distinctly marked 

 than northern ones, and have on the metanotum an obvious yellowish spot, which 

 is much paler in northern examples. -^ 



Larva pale green, black above, with pale green dorso-lateral stripe, which is 

 interru])ted, ringlets and joints also partly pale green ; head black ; horn thin, 

 black. — Food-plant : Gatalpa. 



Pupa slender, glossy, not strongly sculptured. 



Hab. Southern district of Atlantic Subregion : Florida to Delaware, westward 

 to Mississippi and Pennsylvania. 



In the Tring Museum a number of larvae and pupae, and 9 S S, 13 ? ? from : 

 Florida ; Virginia ; Pennsylvania. 



XXVIII. ISOPARCE gen. nov.— Typus : cttpressi. 



Sphinx, Boisduval {non Einn^, 1758), Spec. Gen. Lep. Hit. i. p. 102 (1875). 

 llyhikus, Grote {non Hiibner, 1822), Bull. Buffalo Soc. iV. So. iii. p. 225 (1877). 



<S. Tongue veri/ short and weak, scarcely reaching midcoxae. Palpus small, 

 rough-haired. Tibiae 7iof spiny ; first segment of foretarsns short, somewhat longer 

 than second, not obviously longer than fifth, with several stout spines externally, 

 a{)ical one prolonged, segments 2 to 4 also with one prolonged externo-a2)ical 

 spine ; hindtibia shorter than first tarsal segment ; spurs very long, long terminal 

 one of the length of the first tarsal segment ; no comb to midtarsus ; no pulvillus, 

 jiaronychium without lobes. R- of hindwing before centre of cell, SC" and R' on 

 a long stalk. 



cJ. Tenth abdominal tergite slender, curved, carinate above, apex obtuse in 

 dorsal, acute in lateral, view ; sternite (PI. XXVIII. f li) broad, triangular, obtuse, 

 sinuate, convex below. Olasper short and broad, subdorsal fold lieavy, with long 

 bristles ; harpe (PI. XL. f. 4) consisting of an njjpcr, truncate, dentate, concave 



