89 



oblong holes in the leaves. It La somewhat remarkable that the food 



habits of this species had been overlooked. a- far as published records 



go, until that time, considering that the insect i- widely distributed and 



frequently found in large number.-. The plant 



ha- a still wider distribution than the beetle, which 



is proved by failure to rind it upon this plant in 



Michigan and in central and southern Florida, as 



well as iii other Localities. Even in the vicinity of 



the District of Columbia the species is local and 



not to be found wherever its food plant occurs. 



May 25, L879, the habits of this species were 

 first observed by Mr. Schwarz at Columbus, Tex. 

 It was noticed that a pupa was always to be found 

 in a poeket adjoining- the midrib. The beetle feeds 

 also on the plant. The mines consist of several 

 sinuous branches starting from the midrib, these 

 branches being of varying length and shape. At 

 the end toward the base of the leaf there i- usually an oblong, or 

 nearly oblong, blackish spot, presumably where the v^o; ha- been 

 deposited and where the excrement- of the Larvae collect. 



OOTOTOMA MARGINICOLLIS Horn. 



The perfect beetles were found by Messrs. Hubbard and Schwarz in 

 great numbers riddling the entire foliage of certain small ash tret-- in 

 Madera Canyon. Sta. Rita Mountains, in southern Arizona, during the 

 months of May and June. Neither egg-, larva-, norlarval mine- 

 seen on the trees at this season, and it would seem that the real food 

 plant of the specie- is a vine or some other plant which make- its 

 appearance only after the beginning of the 1 rainy season toward the 

 end of July or in August. 



- 

 inal . 



STENOPODICS FIiAVIDUS lL>rn. 



From various structural details of this genus, Dr. Horn suspected 

 that the habits of the only specie- would prove to be subaquatic. 

 While nothing definite has been ascertained regarding the larval habits, 

 the imago- have been found in various Localities remote from any water, 

 and under conditions which -trongly suggest the larval food plant. 

 Near Brownsville. Tex.. Mr. Town-end and Mr. Schwarz found a 

 number of specimens on a malvaceou- plant which appears to belong- 

 to the genus Abutilon. 



