REVIEWS. 189 



Lepidopterous larvae, are wanting, and they are replaced by membraneous 

 processes, or prolegs; yet neither on these segments, nor on the remaining 

 segments, each of which is furnished with a pair of prolegs (making 

 eighteen in all), have the prolegs the usual coronet of little hooks ; these 

 larva? are, consequently, bad hands at walking, which, nevertheless, they 

 have to do when full fed, &c. Between these extremes there are many 

 gradations found, but the six true legs are uniformly present, though in the 

 family Exapatidae the third pair are usually club-shaped. So much de- 

 pends on an accurate knowledge of the larva? of this group, that it is to be 

 hoped that entomologists will pay especial attention to them, particularly 

 since, apart from their scientific importance, their habits are so strange and 

 eccentric, that they would amply repay any trouble that might be spent on 

 them, and truly they are herein sufficiently exacting. 



The family Tineidae, to which the clothes-moths belong, contains fourteen 

 genera — the first two of which have apterous females. The three last, had 

 they agreed in the development of the maxillary palpi, would probably 

 have been formed into a separate group, from the great length of the 

 antennae in all of them ; " but the development of the maxillary palpi in 

 Nemophora, and the want of them in Adela and Nemotois, show that they 

 are not sufficiently related inter se to warrant such a step ; and to place 

 Adela and Nemotois in a distinct family, leaving Nemophora among the 

 Tineidae, would rather outrage our ideas of relationship." After all, the 

 present arrangement is not quite satisfactory, and we should not be sorry 

 if increased knowledge were to open a way for a partial re-grouping of the 

 genera of this family. 



In the 2nd genus, Solenobia, " we meet with the singular physiological 

 fact of unimpregnated females laying fertile eggs ; and not as the exception, 

 but as the rule." The same anomaly has, as is well known, been observed 

 among the Aphides, but not, as far as we know, as a regular thing, al- 

 though, in some cases, fertile eggs have been laid by unimpregnated 

 females through several generations in succession ; the fertile eggs laid by 

 one female producing other females who, in like seclusion, have laid fertile 

 eggs, and so forth. We do not know of any other instance among the 

 Lepidoptera. 



The 3rd genus, Diplodoma, is remarkable, as the name implies, for the 

 double case in which the larva is enclosed. The 13th genus, Adela, is 

 very tiresome, and " certainly requires sub-division — hardly two species 

 showing an entire accordance ;" there are but six species in it, so it must 

 be a most inharmonious little group, and will probably be dealt upon at a 

 future time. 



