NOUTH AMERICAN LEPIDOPTERA. 153 



length ; palpi reaching the middle of front, the terminal joint cor- 

 neous, curved and produced into a little curved, pointed horn, j)ro- 

 jecting nakedly beyond the frontal vestiture ; antennse fusiform, 

 prominently hooked at tip, the point gradual and aciculate, termi- 

 nating in a bunch of fine hair. Thorax ovate, stout, the vestiture 

 smooth, somewhat elevated at base, well advanced before base of 

 primaries. Abdomen elongate, rather slender, cylindric and some- 

 what obtusely terminated ; segments spinulose along posterior mar- 

 gin. The legs are long and stout, lengthening posteriorly ; median 

 and hind tibire with one and two pairs of spurs respectively, else 

 unarmed. Venation as usual ; jirimaries elongate, narrow, apex 

 acute, outer margin oblique, slightly convex at middle, somewhat 

 excavated above anal angle ; inner margin scarcely sinuate. Second- 

 aries small, narrow, somewhat produced at anal angle. 



This genus is readily known by the peculiar structure of the palpi. 

 The secondaries also have a semi-vitreous discal space, the base more 

 or less yellow, giving the species a characteristic appearance. 



The genus is a tropical one, containing few species, and but one — 

 antceus — is found in our fauna, extending southward into S. America. 



The genitalia of our species have not been examined. 



P. aiitieiis Dm., Ex. ii, 43, pi. 25, fig. 2, Sphinx; Westw., ed. ii, 47, pi. 25, fig. 

 2, Sphinx ; Poey, Cent. Lep. Cub. Dec. i, Amphonyx ; Wlk., C!. B. M. Lep. Het. 

 viii, 200, Macrosila; Clem., Pr. Ac. N. Sci. Phil, iv, 1859, 162, Macrosila ; 

 Morr., Syn. Lep. 1862, 186, Macrosila; H. S. Corr. Bhitt. 1865, 59, Macrosila 

 anthxus : VVallengren, Ofvers. Kongl. Vetensk. Ac. Handl. 1858, 138, Ancis- 

 trognnthus; Grt., Pr. Ent. Soc. Phil. v. 66. Amphonyx; G. A R., Pr. E. S. Phil. 

 V. 162, Amphonyx ; But!., Tr. Zool. Soc. Lond. ix, 599, Amphonyx : Giindlach, 

 Cont. Eut. Cuba 206, Amphonyx ; Edw., •■ Ent. Aiuer. 3, p. 164. 



jatrophee Fabr.. Syst. Ent. 5.38, Sphinx ; Sp. Ins. ii, 143, Sphinx ; Maut., Ins. 

 ii, 94, Sphinx; Ent. Syst. iii, 1, 362, Sphinx; Gmel., ed. Linn. S. N. 2376. 

 Sphinx; Westw., ed. Dru. ii, 47, pr. syn. ; Hiib., Verz. 140, Cocytius; Wlk., 

 C. B. M. Lep. Het. viii, 201, pr. syn. ; Burni., Sph. Braz. 1856, p. 9, Sphinx; 

 Clem.. Jouru. Ac. N. Sci. Phil, iv, 162 ; Bd., Sp. Gen. Het. i, 64, Amphonyx ; 

 Butl., Tr. Zool. Soc. Lond. ix, 599, pr. syn. 



hydaspes Cram., Ins. ii, 30, pi. 118, fig. A, Sphinx ; Fabr., Sp. Ins. ii, 143, 



pr. 



svn. 



medor Cram., Ins. Ex. iv. 215, pi. .394, fig. A, Sphinx; Fabr., Ent. Syst. iii, 362, 



pr. syn. 



Palpi blackish brown, beneath yellowish white. Head, thorax and abdomen 

 blackish brown, irrorate with gray. Tegulaj with a black line at sides, infcriorly 

 edged with white. Abdomen with a series of dorsal dusky .spots of varial)le 

 distinctness; a series of three yellow lateral spots enclosed by a broad blackish 



TE.\N.S. AMEK. ENT. SOC. XV. (20) JULY, 1688. 



