( 352 ) 



w. Aiileiiiiae very strongly I'luiibi'd in 



both sexes ; eye strongly lashed . CIX. Haemorrhaqia. 

 Anlenna not, or moderately, clubbed ; 



eye feebly lashed ...... x. 



X. Sl'^ and >SC^ of forewing anastomosed 



at end CVIII. Sesia. 



SC and SC^ of forewing not anasto- 

 mosed at end .... CVII. FAipyrrhnglosmm. 



Tbibe Dilophonoticae. — Tyjius : Erinmjis ello. 



Dihphoiwlidaf Burmeister, Dcscr. Rep. Argeiil. v. p. 325 (1878). 



c? ? . Thorax with double crest ; head also crested. Merum of midco.xa with 

 indication of angle. Spines of abdomen nniseriate (PI. LII. f. 9), no short spines 

 on posterior tergites. 



Hab. Neotropical Region. 



Four genera ; nineteen species. 



LXXXVIII. PSEUDOSPHINX.— Typus: f,'trio. 



Sphithr Linnd etaiict. reliist. (partim). 



Ih/lninix Hiibner, Verz. hek. Schm. p. 13'J (1822) (partim ; type : pinitstri). 



Pspudo!,-j}hiii.r Burmeister, S/ihliig. Bras. p. 68 (1856) (type : tetrin). 



Manonila Walker, List Lrp. Ins. B.M. viii. p. 198 (1856) (partim). 



Proloparce, Butler (now Burmeister, 1858), Proc. Zonl. Soc. Land. p. 484 (1878). 



cJ ? . Very close to Erintti/i.'i and Isognaflius ; spines of abdominal sternites 

 weaker than in Erinm/is, being thinner and more lanceolate ; crest of mesonotnm 

 higher and shorter, less gradually fading away behind, mesonotum comparatively 

 shorter. 



c?. Process of harpe entire. Tenth abdominal sternite a little longer than the 

 tergite (as is also the case in Erinni/is, but not in Isognatkus). 



Larva with long filiform horn ; head large ; body black with yellow rings in 

 all stages. — Food-j)lants : EKphorhiaceae, especially Plumeria. 



Pupa polished, strongly glossy, with scarcely any puucturation ; frontal 

 tubercles vestigial. 



Hab. Tropical and Subtropical America. 



One of the commonest species of Sphiiu/idae. 



The name Pseudo.'tjiliiii.r is very ajjprojiriate. The insect has the appearance of 

 a species of Spliingicae, into which tribe nearly all authors have put it. There was, 

 however, no e.xcnse for being misled by tlie general resemblance of tetrio to Proto- 

 parcejloroitan and others — striking though it is — after Burmeister had pointed out 

 the true relationshij) with Eriinti/is and Isognatling. Tlie agrfement in structure of 

 these two genera and P.^eudosphinx is so great that the differences in the imagines 

 would not count for anything if they were not accompanied by differences in the 

 larvae, as is the case in Erinni/is on one side, and Pseudosphinx and hognathim 

 on the other. These latter two genera have been united by Burmeister, and we 

 must say that there is ample justification for this course ; in fact, we keep 

 Isognatkus separate from P.-<cado,sphiiix, not because there are any obvious 

 diagnostic characters, but on tlie consideration that the very difficult species of 



