196 JOHN B. SMITH. 



of segments spinulose. Tibiae not spinulose, median with one pair, 

 posterior with two pairs of moderately long unequal spurs ; legs 

 modei'ate, but little longer posteriorly. Primaries eleven veined, 

 venation as usual, outer margin entire, but for a slight excavation 

 above anal angle. Secondaries slightly produced at anal angle. 

 The genitalia of the single species offer no great peculiarities ; the 

 supra-anal hook is rather long, somewhat irregular and with a darker 

 bent tip ; the inferior prcjcess but little exceeding half the length of 

 the other. The side pieces are long, rather narrow, somewhat curved, 

 the tip rounded ; the clasper is a stout rolled plate, extended into a 

 rather short, thick spur or process. 



There is but a single species, differing from Chkenogramma, the 

 genus with which it most nearly agrees in structure, b\^ the lashed 

 eyes, the smaller head, comparatively stouter body and shorter wings. 

 From all the other forms with lashed eyes it differs by the non- 

 s{)inose tibi?e. The dark coloration and small size of the single species 

 renders it easily recognizable. 



D. hylseus Dru., Ex. ii, 45, pi. 2Q, fig. 3, fipMnx ; Cram., Ex. ii, 16, pi. 107, fig. 

 C, Sphinx : Fabr., Sp. Ins. ii, 149, Sphinx ; Mant.. Ins. ii, 97, Sphinx; Eut. 

 Syst. iii, 1, 373, Sphinx : Gmel , ed. Linn. S. N. 2383, Sphinx ; Hiib., Verz. 

 139, Hyloicus ; Westw., ed. Dru. ii, 49, pi. 26, fig. 3, Sphinx ; Harr.,» Sill. 

 Journ. 36, 296, Sphinx; Wlk., C. B. M. Lep. Het. viii, 230, Dolba ; Clem.,® 

 Journ. Ac. N. Sci. Phil, iv, 1859, 178, Dolba ; Morris,* Synopsis 1862, 203, 

 Dolba; Harris,* Inj. Ins. Flint ed. 328, Sphinx; Grt., Biifl". Bull, i, 26, Dolba; 

 Scud.,» Psyche, ii, 77; Bd.,* Sp. Gen. Lep. Het. i, 98, Sphinx; Butler, Tr. 

 Zool. Soc. Lond. ix, 612, Do/6rt ; Pilate,* Pap. ii, 66; Harrington, Can. Eut. 

 xvi, 54; Fernald,* Sphing. 48, Dolba; Holland,* Can. Eut. xviii, 103, Dolba; 

 Grt., Hawk Moths 39, Dolba. 



prini A & S.,* Ins. Ga. i, p. 69, pi. 35, Sphinx ; Westw., ed. Dru. ii, 47, pr. syn. 



Upper side of body and primaries varying from rusty red brown to blackish. 

 Palpi whitish beneath. Thorax white laterally, and with two white dorsal spots, 

 often wanting; the metathoracic tufts black. Abdomen with an interrupted 

 dorsal line, a row of white on each side of middle, and a darker lateral baud, all 

 the segments margined with white. The under side of thorax and abdomeu is 

 white. Primaries with a white patch at base and a white discal dot. A series 

 of three black dentate transverse lines at basal third, the inner lines accompa- 

 nied by white shades. Another series of three similar lines at outer third ; the 

 inner line darkest, heaviest and most dentate, the outer line more or less white 

 powdered, and beyond this the wing is usually more or less blotchy and white 

 marked. A rather evenly sinuate series of somewhat lunate spots, the hinules 

 convex inwardly betweeu this last series of lines and the outer margin, and a 

 similar but less complete row of marginal lunules, convex outwardly. A sub- 

 apical streak surmounted by an apical white shade. Secondaries smoky brown 

 to blackish, with whitish at base, and a whitish shade accompanying the dentate 



