Sphingidae 
(i) Dictyosoma elsa Strecker, Plate V, Fig. 14, $ . (The 
Elsa Sphinx.) 
This peculiarly colored hawkmoth, which rnay easily be 
recognized by the figure in our plate, occurs in Arizona. A 
number of years ago Mr. Jacob Doll reared a large number of 
specimens from the larvae. Since then but few specimens have 
been obtained, and it is as yet comparatively rare in collections. 
Genus ATREIDES Holland 
The generic name Atreus proposed by Grote and adopted on 
structural grounds by Rothschild & Jordan for this genus, 
having been preoccupied by Koch in the Arachnida , I have 
given the name Atreides to the genus, which contains the single 
species named originally Sphinx plebeja by Fabricius. 
(1) Atreides plebeja Fabricius, Plate V, Fig. 6, $. (The Ple¬ 
beian Sphinx.) 
This common species feeds in its larval state upon the 
trumpet-vine ( Tecorna ). It ranges from Canada to the Gulf 
States and westward to the Mississippi, wherever its food- 
plant is found. It is double-brooded in the Middle States, one 
brood appearing in June, the second in August. 
Genus HYLOICUS Hubner 
This geniis, which includes some thirty species, most of 
which are found in America, though a few occur in Europe and 
Asia, is represented in our faunal limits by sixteen species, of 
which eleven are figured in our plates. It corresponds largely 
with the genus Sphinx as defined by many recent writers. 
(1) Hyloicus eremitus Hubner, Plate VI, Fig. 6, $ . (The 
Hermit Sphinx.) 
Syn., sordida Harris. 
This hawkmoth, which is double-brooded, lives in the larval 
stage on spearmint ( Mentha ) and wild bergamot ( Monarda ). It 
ranges from New England southward to Georgia, and westward 
into the Mississippi Valley. It is not uncommon in western 
Pennsylvania, where it is double-brooded. 
(2) Hyloicus eremitoides Strecker. (The Hermit-like 
Sphinx.) 
Syn., lugens Grote {non Walker). 
49 
