568 TRANS. ST. LOUIS ACAD. SCIENCE. 



cannot considei* such differences more than varietal, and would 

 designate this small pale variety as var. Coloradensis. The /Egiale 

 Cofaqui oi Mr. Strecker (^Proc. Ac. Sci. Phil. 1876, p. 148), taken 

 in Georgia, should, I think, also be considered but a w^ell-marked 

 variety. 



Regarding the boring habit in butterflies, I learn from Prof. P. 

 C. Zeller, of Stettin, -Prussia, that there is also a Hesperian [Eryn- 

 nis alcecB, Esp.; malvarum, Hoffm.) which Kirby gives as common 

 to Europe, Asia and Africa, whose larva bores in autumn into 

 the stems of its food-plant {Malva sylvestris)^ in which it hiber- 

 nates, and in which it goes through its transformations the fol- 

 lowing spring. 



Regarding other insects that bore the stems of Yucca, Mr.. 

 Bolter found a Cerambycidous larva at this work in Florida. It 

 appears to belong to Elaphidioti ., enters from the side, but not very 

 deeply, and enlarges the bottom of its burrow. The Curculionid 

 Scyphophorus yuccce, Horn, is said to bore the stem of Yticca glo- 

 tiosa* in California. 



Further Remarks on Pronuba yuccasella, and on 

 the Pollination of Tucca. 



By Charles V. Riley. 

 [ Read Nov. s, 1877.] 



In a recent Bulletin of Hayden's Geological atid Geographical 

 Survey of the Territories (vol. iii.. No. i) is an extended article by 

 Mr. V. T. Chambers on "The Tineina of Colorado," in which, 

 on the very first page (121 of the Bulletin) the following para- 

 graph occnrs : 



Fronuba yuccasella Riley. — Very abundant in the flowers of "soap-weed" 

 (^Tucca) as high up on the mountains as 7,000 feet, in the vicinity of Colo- 

 rado Springs. Mr. Riley says (^Fifth Annual Report Noxious and Benefi- 

 cial Insects of Missouri, p. 151), " Front wings uniformly silvery-white," 

 but at least half of the numerous specimens observed by me in Colorado 

 had the wings more or less spotted with black (like Hyponomeuta, to which 

 in the form and neuration of the wings it seems somewhat allied, though 



* Probably baccata or Whipplei, since, according to Dr. Engelmann, gloriosa does not 

 occur in California. 



