( 340 ) 



(the |)()iiits direpf.iul l)iisii(l) and forming tlie outer border of the dark band or band- 

 like area, tlie tliird line also erenate, luore distal. lu Pachjsphinx we meet with 

 the same lines, the second (witliin tlie dark band) being, however, always absent 

 and the tliird seldom obvious ; the fourth and fifth are erenate as in Amorpha. In 

 Sphinx the homolojr_v of the lines is obscured. The hiudwing of Picchi/sphinx, 

 though so similar to that of Sphinx kindermanni, reminds one nevertheless of 

 Amorpha })Opuli by the red colour being intensified subbasally behind the cell, 

 forming here a patch corresponding to the tawny jiatch of jiopuli. The red basal 

 area on the forewing below is a Sphinx character. In structure I'nchi/.sphinx agrees 

 with some species of Sphinx in possessing a claw at the end of the foretibia, and 

 with Amofj/ha in the more strongly si)inose abdominal tergite and the bilobate 

 harpe. The ])enis-sliealh is similar to that of Amorjiha in being devoid of a conical 

 tooth, while it differs from both Amorpha and Sphinx in being very slender, and 

 having instead of a number of sj)ines a single tooth as armature of the membrane 

 of the duct. The frenulum of the S is as much reduced as in Sphinx. 



28(t. Pachysphinx modesta. 



Smeriiithus modesta Harris, in Sillim., Jonni, Sc/. Art xxxvi. p. 2'J2. n. 6 (1830). 



Smerinthm iiiodeslu:< (!), Walker, List Lep. Lis. B. M. viii. p. 248. n. 10 (1856). 



*Smerinthiis jiriiireps id., I.r. p. 225. n. 21 (1856) (Mus. Brit.). 



La>,tl,oe modestiLi, Grote, Bull. Biifoh, Soc. N. Sci. i. p. 24 (1874). 



Smeri/ithnK poj)idic<ilii Boisduval, Spec. Geii. Lip. Het. i. p. 22. n. (1875) (nom. nor.). 



Amorpha wodf.^ta, Grote, I.r. ii. p. 227. n. 44 (1875). 



Tnptofjo,, modesta, Butler, Tram. Zoo!. Soc. Loud. ix. p. 580. n. 23 (1877) ; Grote, I.e. iii. p. 223. 



n. 45 (1877). 

 Siiieriiitfins ocridentaHa var. Edward.i, Calif. Ac. Nat. Sci. vi. p. 02 (1876). 

 Siiieriidhui cablet Reizenstein, in Scr/lmrr's Monthly xxii. p. 864. fig. (1881). 

 M,n>iiid,a modesta, Kirby, C<it. Lcp. llet. i. p. 708. n. 33 (1892). 



S- Antenna long, strongly compressed, slightly dilated laterad as in Sphinx 

 ocellata, ciliae long. Tenth abdominal tergite stronger chitiuised than in Sphinx ; 

 the sternite much broader than in Sphinx and Amorpha, with almost parallel sides 

 (PI. XXII. f. 13). Clasper dilated dorsad at apex, very broad (PI. XXII. f. 13); 

 harjie large, ventro-distally produced into two lobes ; the dorsal edge of the harpe 

 raised into a broad lobe, which is rough with short ^jointed tubercles and teeth. 

 Peuis-funnel short, without process ; penis-sheath comparatively slender and weak 

 (absolutely slenderer than in the much smaller species of Sphinx), without external 

 armature ; the membrane of the duct strongly chitinised in a small place, armed 

 with a more or less prominent solid tooth, which is visible throngli the sheath as a 

 black spot, if the duct is not pushed out (PI. XXIX. f. 37). 



?. Antenna thin ; j)roximal edges of the segments feebly raised, dorso-lateral 

 expansions of S barely vestigial in ? ; a proximal series of very slightly prolonged 

 ciliae, surface of segments feebly concave laterally and ventrally. Eighth abdominal 

 segment rather strongly chitinised, brown ; antevaginal portion of plate short 

 (PI. XV. f 17), the ridge thick. 



Nab. Nearctic Region. 



There are three subspecies : 



(modesta. : Eastern States ; Canada to California ; 

 imperator : Arizona ; 

 rfiynlis : Mexico. 

 Judging from our Arizona material obtained from Dr. E. Kunze and E. J. 



