1899. J NATURAL SCIENCES OF PHILADELPHIA. 275 



Jatter being an Aspidiotu-'. He then proposes that the name abietis 

 be retained for the Mytilaspis with himself as its author. This 

 must hold, and the name confusus, proposed by Horvath, will fall 

 as a synonym. 

 Mytilaspis ulmi (L.). 



Coccus ulmi Linue, Syst. Nat., Ed. x, 1758, p. 455. 



Mytilaspis pomorum Bouche et Auctt. 



Linne gives no description, but cites, " Reaum. ins. 4, t. 2, 

 5. f. 5-7, and alia t. 7. f. 1-10." Reaumur's pi. 5, figs. 5-7, 

 represent the Mytilaspis of the elm, which is now considered iden- 

 tical with that of the apple; they are, in fact, the very figures 

 which Geoffroy cites for his Coccus arborum linearis. R('aumur's 

 pi. 7, figs. 1-10 represent Gossyparia spuria (iilmi). 

 Mytilaspis beckii (E.Newman). 



Coccus beckii E. Newman, Entomologist, Feb., 1869, pp. ^IT, 218. 



Mytilaspis citricola (Pack ), Comst. et Auctt. 



The name beckii is based on Beck's figures and notes, which 

 are unmistakable. Newman erroneously supposed the apple 

 Mytilaspis to be the same. 

 Parlatoria proteus var. crotonis Dougl. 



Ent. Mo. Mag., April, 1887, p. 242. 



The species found so commonly on crotons, described as crotonis 

 (perga)idei var. ) by the present writer, appears to be the same as 

 that of Douglas. I had overlooked the latter' s article on the sub- 

 ject. 

 Diaspis pentagona Targ.-Tozz. 



Rivista di Bachicoltiira, 1886, No. 11 ; reprhited in Bull. Soc. Eat. Ital., 

 1887, pp. 184-186. 



u. syn. Diaspis amygdali Tryon. 



The probability of this synonymy had occurred independently to 

 Mr. Marlatt and the present writer; an examination of Italian 

 material of pentagona confirms it. 



Targioni-Tozzetti's 1886 account is of a very general nature, 

 but will hold the name. In a pamphlet published in INIilan in 

 1890 he gave a scientific description with figures. There is also a 

 description in Ball. Soc. Ent. Ital., xxi, 1890. 



