Prof. Frey, and some American Teneina. 199 



dozen of our indigenous species, and has compared them with as many 

 from Europe, or with the figures in Stainton's Nat. Hist. Tin. The 

 Teneina differ in this but httle from other insects, except that like 

 most other lowly forms of life they are more universally dispersed. 

 The genus Gracilarui, for instance, is found in England, Asia, and 

 Holland, and in the United States from Cambridge to California, and 

 the closely allied genus Coriscium goes with it. But the species of the 

 United States are like those of other countries besides Europe, in some 

 respects. Thus Corisdiim alhanotella, Cham., though not strictly resem- 

 bling any species known to me, yet resembles rather more than any 

 other Glacilaria nitadula, from New Holland, figured by Mr. Staintou 

 in Trans. Lond. Ent. Soc, 1863, plate 10, fig. 9, as to the form of the 

 marks, though the ground color is more like G. callicella, Stainton, loe. 

 cit. But then, on the other hand, a collection of "micros" from Texas, 

 containing over seventy species, differ more from the Teneina of Ken- 

 tucky than these do from those of England. 



Upon one other point I likewise wish to take issue with the Profes- 

 sor, and at the same time with such other Micro-Lepidopterists as have 

 not been to a great extent collectors of these insects in all their stages. 

 My experience in this respect has not been small, and I knoiv that the 

 common opinion, or at least the coram'^n mode of expression, as that 

 there are two (or more) broods of a certain species in a year, or, that 

 the larvse may be found at such a time, and the pupae at such a time, 

 and the imago at such a time, and not other times, are erroneous, so far, 

 at least, as most of the little leaf-mining species are concerned. Some 

 species hybernate in the imago state (as LithoeoUetis^ rohiniella, Clem.j, 

 some as pupse, as do most species, and others as larvse (as does L. Cin- 

 cinnatiella, Cham.) They make their first appearance at different sea- 

 sons. L.rohinielki, Clem., of course may be found early ; L. crcttcegeUa, 

 Clem., Tesclieria, malifoballa, Clem., and othei's, apj)ear here in Mareh; 

 L. hicidicostella, Clem., and L. hasi&ligella, Clem., and others a little later, 

 and L. ornatella, Cham., Gracila7'ia(^Parveetopa) r(^i7nella^ Clem., the spe- 

 cies of Antispila Aspidisca, and some others, do not apj^ear till early 

 June, unless May be very warm. Most forms begin to oviposit in 

 the leaves in May, but the locust-feeding species usually do not until 

 June ; and I assert it as a fact, which any one can verify, that, con- 

 stantly, with any one of these species, the larvse may be found in their 

 juines at all times, from their first discovery until the fall of the leaves^ 

 and the same is true of the pupse, and of the moths, from their first 

 appearance until the leaves fall ; thei-e is no interlude. Of course 

 there are only a certain number of descendants from any given fesaale, 

 but that does not affect the case. They ai'e constantly laying egg^. 



