372 ' Annals Entomological Society oj America [Vol. XII, 



Adult — Platymetopiiis hyaliniis Osborn. This was described 

 by Osborn in 1900 (Ent. News, vol. XI, p. 501) from five 

 females and four males collected in Washington, D. C, June, 

 1897, by Mr. J. S. Hine, who stated that they were very abun- 

 dant upon an introduced species of maple. As this description 

 is available to most entomologists, there is no need to repeat 

 it here. It might be stated, however, that the insect can be 

 recognized due to the fact that it is quite distinct from any 

 other species of the genus occiirring in this country.- In 

 Osborn's description it is characterized as follows: "Elytra 

 hyaline with dark points and fuscous bands arranged, one sub- 

 basal, one median and one subapical. Face bright, sulphur- 

 yellow, vertex, pronotum and scutellum yellow, with some 

 infuscations or greenish washes. Length, female, 5.5 mm.; 

 male, 4.25 mm. " 



Van Duzee, in his "Revision of the American Species of 

 Platymetopius, " (Annals Ent. Soc. Amer., vol. 3, 1910, p. 218), 

 states that "this insect is quite aberrant in its genus by its 

 uniformly whitish hyaline elytra crossed by three narrow 

 fuscous bands. Prof. Osborn described it fro:m a series taken 

 from an imported tree at Washington, D. C, and strongly 

 suspected that it might be an exotic form introduced from 

 material added to the Botanical Gardens there. In that case 

 it probably has become acclimated as Mr. C. W. Johnson has 

 sent me a specimen he took near Philadelphia." 



While Pennsylvania and the District of Columbia are the 

 only localities listed in Van Duzee's Catalogue, it probably 

 occurs in many other eastern places in view of the wide dis- 

 tribution of the Japanese maple as an ornamental tree. We 

 believe that Prof. Osborn's surmise that this is an introduced 

 species is correct and that it has been brought into this country 

 on imported maples.. This is quite possible in view of the 

 fact that overwintering takes place in the egg stage in the 

 twigs. 



