LEPIDOPTERA— NOCTUID^. 51 



These moths were considerably shaken up in carrying them in from 

 the cave and had become partly warm before they were placed in the 

 dark room. The temperature of the dark-room remained moderately 

 low usually, but may have been raised occasionally when the room was 

 used for photographic work. 



The results of this experiment were confusing and somewhat unsat- 

 isfactory, but seemed to indicate that the moth tended to orientate itself 

 with its head from the source of light wherever it was. Under more 

 favorable conditions the results ought to be definite and convincing. 



I have seen this moth in Donaldson's Cave in autumn. According 

 to Smith (1893, 224) its distribution includes Nova Scotia, Hudson Bay 

 Territory, and south to Texas, New Mexico, and west to California, and 

 it is found from May to November. 



Plathypena scabra Fabricius. 



Fabricius, Ent. Syst., Suppl., 1794, 4448. Smith, Bull. 44, U. S. Nat. Mus., 1893, 

 395; Bull. 48, U. S. Nat. Mus., 1895, 111. 



Less abundant than the former species but also fairly common, 

 hibernating in the cave. On the average this species does not remain 

 quite so near the mouth as S. libatrix, but it never goes beyond twilight. 

 It, too, commonly takes up a position for the winter with its head from 

 the light, but this orientation is not nearly so constant as in the other 

 species. 



It is common in Donaldson's Cave at Mitchell. According to Smith 

 (1893, 224) this is one of the most abundant species from June to 

 November, from Nova Scotia to Texas east of the Rocky Mountains. 

 I find no mention of its wintering over. 



Order ORTHOPTERA. 

 Family LOCUSTIDAE. 



Ceuthophilus stygius (Scudder). 



Rhaphidophora stygia Scudder, Proc. Bost. Soc. Nat. Hist., viii, 9 (Hickman's 

 Cave, Kentucky [A. Hyatt]). Packard, Am. Nat., v, 745 (Mammoth Cave). 



Rhaphidophora Cope, Rep. Ind. Geol. Surv., iii, 1872, 167. 



Ceuthophilus stygius Scudder, Bost. Jour. Nat. Hist., vil, 438. Packard, Mem. 

 Nat. Acad. Sci., iv, 1888, 70, 83 (White's, Fountain, Dixon, Diamond, and John 

 and Fred Field caves in Kentucky, and Wyandotte, Little Wyandotte, Bradford, 

 and a cave in Washington County, Indiana; One Hundred Dome and Laurel caves, 

 Kentucky [Sanborn]). Brunner, Monog. Stenop., 65 (Texas). Blatchley, 

 Proc. Ind. Acad. Sci., 1892, 148 (cave in Crawford County [W. P. Hay]). Scudder, 

 Proc. Am. Acad. Sci., xxx, 1894, 33 (locahties as above). Blatchley, Rep. Ind. 

 Geol. Surv., 1896, 198-200 (Wyandotte, Little Wyandotte, Sibert's Well Cave, 

 and Saltpeter Cave, Crawford County, Porter's, Truett's, and Strong's caves). 



