378 MODERN CLASSIFICATION OF INSECTS. 

' Fig. 105. 5. represents a portion of the wing of this insect, to show 
the manner in which the scales are arranged, and jig. 105. 7. the 
anterior, 8. the intermediate, and 9. the posterior tibiz, to show the 
spurs. 
The Wood leopard-moth (Zeuzera Aisculi) is distinguished by the 
beautiful structure of the antenne of the males (fig. 105. 15. male, 
16. female antenne.) The larva of this insect feeds upon the wood 
of apple, pear, and other fruit trees; like that of Cossus, it is a naked 
fleshy grub, and has the prothorax defended above by a_ broad 
horny shield. There are notes relative to this insect, published in 
Nos. 6, 7, and 8. of the Mag. Nat. Hist., 1st series, and G‘ardener’s 
Magazine, Nos. 78. 91., and Arboretum Britann. p. 887. 
The Continental genus, Stygia, placed by De Villiers (Ann. Soc. 
Linn. Paris, v. 473.) between Algeria (Sesia) and Anthrocera (Zy- 
geena), is considered by Latreille as more closely allied to Cossus. The 
situation assigned to these insects by Latreille, at the head of the 
Nocturnal Lepidoptera, evidently originates in the similarity of their 
transformations with the /Egeriide (although Latreille interposes the 
Anthroceride between them). There appears, however, to be but 
little relation in the imago state, either in respect to their habits or 
structure, so that it may be questioned how far the relation is more 
than one of analogy; at all events, I hesitate as to the propriety of 
placing the /Egerie in the same natural group with Hepialus and 
Cossus, as Mr. Newman has done. Mr. Stephens suggests a relation 
with Smerinthus, and Mr. Curtis with Stauropus through Zeuzera. 
Latreille, on the other hand, has always placed Saturnia immediately 
after Zeuzera; but I do not find that he has ever expressed any 
opinion on the affinity of these genera. Looking at the structure of 
