NORTH AMERICAN LEPIDOPTERA. 55 



The genus Sphinx is here defined as follows : Palpi duo refiexi, 

 pilod. Lingua spiralis plerisque exserta. Antenna: sqiumimatce." 



The genus is headed by ocellata, followed by luguhHS, then the 

 other European Smerinthids and then the other Sphinges in no par- 

 ticular order. The Linnaean idea of dentate and non-dentate wings 

 seems to have controlled the arrangement. 



On page 547 of the same work he creates his genus Sesia, defining 

 it as follows : " Palpi refiexi. Lingua exserta, truncata antennce cylin- 

 dricoi, extrorsum crassiore.s." 



The first species is our tantalus, then hyla.s, of China, then stella- 

 tarum, of Europe, then the clear wings, thijsbe and fuciformis. These 

 are all allied, at least in some respects, but the following species are 

 those later termed by him j.'Egeria. 



Zygwna is defined on page 550 as having : " Palpi refiexi. Lingua 

 exserta setacea. Antennce scepins medio crassiores.^' 



Z. pholiis is the only American representative. In the other, sub- 

 sequent published works of this author, no changes are made in this 

 group, save that new species are added, described since the preceding 

 period of publication. 



In 1777, Scopoli proposed the genus Macroglos.sa for the European 

 stellatarum and allies. 



In 1801 Laspeyres, in his "Sesice Earopce Iconibnset Description ibus 

 illustratce,'' excludes from the genus Sesia all those species not allied 

 to tipuliforniis. 



In 1805, Latreille, in the Histoire Nat. des Crust, et Ins. vol. xiv, 

 calls his second family Sphingides, divided as follows : 



Sphinx. — Antenna? thickened to a prismatic club, with a simple 

 thread at ti|) ; tongue present. 



Atropos, ligustri, convolvuli, elpenor, euphorbioe, oenotherce, stellatarum, 

 fuciformis, bombyliformis. 



Snierinthus. — Anteniiie prismatic, pectinate or serrate, hooked at 

 tip ; tongue very short, or nearly wanting. 

 S. tilice, ocellata, populi, quercus. 



Sesia. — Antenuiie spindle shaped, a little incurved, at tip with a 

 little scaly tuft ; palpi nearly clavate, second joint stouter, clothed 

 with hair or scales. 



S. ajyiformis, tipulijormis, cuUciJormis. 



Zygcena. — Antennse spindle shaped, often curved, without scaly 

 tuft. Palpi nearly clavate, the second joint not more strongly clothed 

 with hair than the others ; tongue present. 

 Z. filipendula', loti, scabiosa, staticis, etc. 



