NORTH AMERICAN LEPIDOPTERA. 67 



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

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

 crepuscular. Larvae colored, naked, with a caudal horn, which is 

 sometimes obsolete and replaced by a callous spot ; 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 * — Smerinthus, Ceratomla^, Sphinx, Fhilampelm^ , Deilephila. 



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

 the Bomlnjciche are placed at the head of the series, running to Del- 

 lephila as the most natural grading into tlie Maeroglossidce. Harris 

 did not appear to know Hiibner's work, and, in fact, his supi)ly of 

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

 tremely limited. 



The Maeroglossidce are defined as follows : 



" Antennas 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 upon the surface in an imperfect cocoon under 

 leaves." 



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

 and Sesia. 



The ^-Egerlidte 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, ^-Egeria and 

 Tkyris. 



The English entomologists are followed in the use of the terms 

 Sesia and jEgeria. 



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

 ognized : AgaristidcE, with Alypia as only genus ; Zygwnidce with a 

 single (new) West Indian genus Mastigocera and Glaucopididce with 

 the genera Glaueopis, Syntomeida, Cosmosoma, Lycomorpha, Ctenuchi 

 and Psychomorpha. 



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

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



