75 



being lightly roughened and never so smooth as in tin- Lepidopterous 

 mines. In outline the beetle-larva mine is aeither uniformly rounded 

 nor provided with linger-like processes, but irregularly undulated. 

 As soon as the larva has left the mine or has changed to pupa, the 



affected part of the leaf dries up and assume- the dismal brown color 

 already alluded to. 



GEOGRAPHICAL DISTRIBUTION. 



This species is native to North America, and apparently partial to 

 the upper austral life zone, hut its full distribution does not appear 

 to have been clearly denned beyond published statements that it occurs 



in New England and the Middle. Southern, and Western States. 

 Northward, we know of its occurrence in Massachusetts, Connecticut, 

 and Canada, but it does not appear to have ever been taken in Michi- 

 gan, a State which has been rather thoroughly collected over by Messrs. 

 Schwarz and Hubbard. In Missouri, although numerous collectors 

 and observers have made collections in that State, the species appear- 

 to be rare, although taken in two localities. It will thus be seen that 

 although the southern and western range i- practically limited by the 

 States of Virginia. Kentucky, and Missouri southward, and by Mis- 

 souri also westward, the precise limits of its range remain to be 

 determined. 



In his Check List of the Forest Trees of the United States (Bui. 17. 

 Div. Forestry. U. S. Department Agr.. 1898, p. 82) Mr. George B. 

 Sudworth speaks as follows regarding the distribution of Robinia 

 pgt udacaeia: 



Range. — From Pennsylvania (on the Appalachian Mountains from Locust Ridge 

 in Marion Comity) to northern Georgia. Widely naturalized through cultivation 

 and other agencies throughout the United States east of the Rocky Mountains; possi- 

 bly indigenous in parts of Arkansas (Crowleys Ridge, etc. I and eastern Indian Ter- 

 ritory; also in the Great Smoky Mountains of eastern Tennessee Sevier County . 



From the entomological record it would seem, therefore, at least at 

 the present writing, that this locust hispid has a more limited range 

 of distribution than its food plant, which is not infrequently noticed 

 among Insects and which occurs also in another species of Hispidae, 

 viz. the trumpet-creeper leaf-miner. Octotoma plicatula, which will 

 be considered later on in the present article. 



The following is a list of localities from which the species has been 

 received at this office or i< known to the writer or recorded: 



Massachusetts; Connecticut; Allegheny, Y<>rk. Pa.: Coney Island, Rockaway 

 Beach, Yapbank, L. I., X. Y.; NYw Jersey (throughout the State— Smith); Ten- 

 nallytown, Washington, D. 0. : Oakland, Bladensburg, Glen Echo, Cabin John, 

 Marshall Hall, Md.: Cherrydale, RosBlyn, Va.; Monongalia, Wood, Hancock. 

 Harrison, Upshur, Tyler, Preston, and Tucker counties, Morgantown, Kanawha. 

 Clarksburg, W. Va.; southern Ohio, particularly Brown, Clermont, and Hamilton 

 counties; Nazareth, Frankfort, Ky.; Cadet. Louisiana. M>. : Indianapolis, Ind. 

 (Blatchley). 



