1865.] 319 



cies of the genus structurally identical with the Plusias from the At- 

 lantic States and Europe. I have also specimens of an undescribed 

 Bombycid genus before me. which at first sight I had inclined to believe 

 peculiar to the Territory, since when I have received representatives 

 of the genus taken on Long Island and in Pennsylvania. The Geome- 

 tridse of Colorado and the Noctuidiz will be found also well represented 

 I infer from what material T have seen. Plateea H-S. among the for- 

 mer is an original form, Heliocheilus (Irote. among the latter. The 

 Bombycid* are less numerous, in which we have Ooluradia Pandora 

 Blake, though both this family and the Sphiugidae seem poorly repre- 

 sented, of the latter Deilephila lineata, apparently common to both the 

 New and the Old World, is the only species which as yet has been 

 brought from the Territory. 



A small collection of the larger Lepidoptera which I examined last 

 year in St. Louis, Mo., offered nothing original, the species being those 

 commonly met with on the Atlantic Coast ; while I took in the vicinity 

 of the city in early October specimens of the very interesting Poecilop- 

 tera compta Clemens, differing slightly in ornamentation from Dr. 

 Clemens' description, but I think specifically identical with the Texan 

 species. It has been already noticed that Southern forms extend to a 

 greater distance up the Mississippi Valley than on the Atlantic Slope. 



P. compta clings to the stems of plants in dull weather, not willingly 

 flying, and may be readily shaken off into the collecting bottle. The 

 sexes do not differ. The wings are folded round the body when at rest ; 

 in coitu the ani are firmly adherent, the sexes resting in opposed posi- 

 tions. 



At Rock Island, 111., I identified specimens of the very interesting 

 Harrisina Sanborni Pack., taken by Mr. Walsh in that vicinity. 



Mr. A. Bolter has sent me a series of Lepidoptera for determination, 

 the occm*rence of certain of which in die vicinity of Chicago is inter- 

 esting. Darapsa myron Cram, sp., Smerinthm juglandis A. k S. sp . 

 Sphinx brontes Drury. represents the Sphingidre in this collection. 

 It is to be remarked that Dr. Clemens does not cite Boisduval's figure 

 PI. 15. fig. 6. either in his synonymy of Drury's S. brontes. or to Cera- 

 tomia repentinm Clem., which appears to be the same species. The 

 larva is destitute of thoracic horns, as is not Ceratomia i-cornis H., as 

 far as I recollect from specimens bred some time since, which I found 

 numerous on the common lilac on Long Island ; I had been preparing 

 a paper in which I attempted to show from dissections its position in 

 the family. I am at present inclined to regard it as a low form of 

 Sphinx, approaching Ceratomia, and therefore Smerinthm and the 



