( 3. '52 ) 



//'. Allti'lllliic ViTV st l'<iiit;ly cIiiIiIkmI in 



1 lot li sexes ; eye strongly lashed . ClX. Ifnr/norr/tm/ia. 



Aiiteiiiiii not, or moderately, clulibed ; 



eye feeldy laslicd ...... x. 



jr. S('' and Sd' of Corewinj;; anastonioscd 



at end CVIII. Se.%m. 



SC^ and S(V' ot" forevving not anasto- 

 mosed at end .... CVII. Eupi/rrlioglo.s.sHm. 



TuiiiK Dilophonoticae.— Typus : Kriiuu/is ello. 



DHophnnntiitae Hurmeister, Descr. Rep. Argent, v. p. 325 (1878). 



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

 indication of angle. Spines of abdomen uniseriate (1*1. LII. f. 9), no short spines 

 on posterior tergites. 



Hub. Neotropical Region. 



Four genera ; nineteen species. 



LXXXVIII. PSEUDOSPHINX.— Typus : tefrio. 



SphiiLT Linne etnitct. i-etust. (partim). 



Ni/lnku.1 Hiibner, Verz. beh. Sehm. p. 139 (18-22) (partim ; type : piwistri). 



Pseudnsphiii.r Burmeister, S/ili/iiy. lims. p. 08 (18.')()) (type : tdrin). 



Macroglia Walker, Li^t L>i>. Ins. II.. U. viii. p. 198 (1856) (partim). 



Protnparre, Butler (mm Burmeister, 1858), Pror. Zool. Sue. Loud. p. 484 (1878). 



S ? . Very close to Erinnyis and Isognathus ; spines of abdominal sternites 

 weaker than in Erinn>/is, being thinner and more lanceolate ; crest of mesonotum 

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

 shorter. 



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

 tergiti; (as is also the case in Erinni/is, but not in Isognathus). 



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

 all stages. — Food-})lants : Enphorbiaceae, especially Pliimeria. 



Pupa jiolished, strongly glossy, with scarcely any puncturation ; frontal 

 tubercles vestigial. 



Hab. Tropical and Subtropical America. 



One of the commonest species of Spkiiigidae. 



The name Pseudosphinx is very appropriate. The insect has the appearance of 

 a s])ecies of Sphingicae, into which tribe nearly all authors have put it. There was, 

 however, no excuse for being misled by the general resemblance of tetrio to Proto- 

 parcejiorestan and others — striking thougii it is — after Burmeister had pointed out 

 the true relationship with Elrinngis and Isognathus. Tiie agrf emeut in structure of 

 tliese two genera and Pseudosphinx is so great that the diflferences in the imagines 

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

 larvae, as is the case in Erinnyis on one side, and Pseudosphinx and Isognathus 

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

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

 Isognathus separate froiu Pseudosphinx, not because there are any obvious 

 diagnostic characters, but ou the consideration that the very difficult species of 



