NORTH AMERICAN LliPIDOPTERA. 67 



short, thick and obtuse, with the third joint minute and concealed. 

 Body thick ; abdomen conical and not tufted at the end. Flight 

 crepuscular. Larv?e colored, naked, with a caudal horn, which is 

 sometimes obsolete and replaced by a callous s{)ot ; they devour the 

 leaves of plants and go deep into the earth to transform, or conceal 

 themselves upon the surface under leaves in an imperfect cocoon." 



Six genera are here included, those newly created being indicated 

 by a * — Smenntkus, Ceraioviici^, Sphinx, Phllanipelu.r'\ Deilephila. 



It will be observed that here the Smerinthini or nearest allies of 

 the Bomhycidoe, are placed at the head of the series, running to Dei- 

 lephila as the most natural grading into the Macroglossldce. Harris 

 did not appear to know Hiibner's work, and, in fact, his supply of 

 literature, except from English sources, appears to have been ex- 

 tremely limited. 



The Maeroglossidxe are defined as follows : 



"Antennae fusiform, prismatic, ending with a hook, and trans- 

 versely biciliated beneath in the males. Palpi pressed close to the 

 face, with the third joint minute and concealed, short, thick and 

 obtuse at the end in some, slightly elongated and subacute in others. 

 Body short and thick, or flattened a little ; abdomen tufted at the 

 end. Flight diurnal. Larvse colored, naked, with a caudal horn, 

 which is sometimes obsolete and replaced by a callous spot ; they 

 devour the leaves of plants and enter the earth to transform, or 

 conceal themselves u{)on the surface in an imperfect cocoon under 

 leaves." 



Three genera are placed in this family, viz. : Fterogon, Thyreus 

 and Sesia. 



The jEgeriidcE follow next in order, and are elaborately defined ; 

 but with them we have nothing to do at present, save to state that 

 three genera are placed in the family, viz. : Trochilium, JEgerui and 

 Thyris. 



The English entomologists are followed in the use of the tei'ms 

 Sesia and jEgeria. 



In the second tribe, " Sphinges adscit.e," three families are rec- 

 ognized : AgaristidxK, with Alypia as only genus; Zygcenidce with a 

 single (new) West Indian genus Mastigoeera and Glaucopididce with 

 the genera Glaucopis, Syntomeida, Cosmosoma, Lycomorpha, Ctenucha 

 and Psychomorpha. 



It is not to Harris, therefore, that we owe the mess of genera 

 known as Zygcenidie in Mr. Grote's most recent list. 



