1899.] NATURAL SCIENCES OF PHILADELPHIA. 265 



ones. This should be easily recognized when found again iu 



Europe. 



Rhizaecus (?) terrestris (NTewst.). 



Ripersia terrestris Newst., Ent. Mo. Mag., 1895, p. 213. 



This has in common with Rhizcecm falcifer the peculiar elongate 

 shape, the 5-segmented antennae, the elongated mentum, and the 

 prominent caudal tubercles. Newstead figures no eyes, nor men- 

 tions them. The terminal segment of the antenna has not the curi- 

 ous falciform spines observed in R. falclfer and elotl. 

 Rhizaecus (?) mammillariae (Targ.-Tozz.). 



Dactylopius mammillarUe (Targ.-Tozz.). 



Westwoodia sp. n. (?), Targ.-Tozz., Annali di Agricoltitra, 1884, pp. 402, 

 403, figs. 



Found at the roots of Mammillaria. Targioni-Tozzetti at first 

 called it Dactylopius mammillarue, but later left it without a 

 specific name. He says his material was immature, but the tibia is 

 considerably larger than the tarsus, pointing to a subadult condi- 

 tion at least. The insect differs from Pergandiella in any stage by 

 the elongate mentum ; in this it agrees with Rhizcecxis, but it differs 

 from that in having well -developed eyes, and in lacking the falci- 

 form spines on the antennae. The antennae, though 6-segmented, 

 resemble more those of R. ( ?) ferredris than typical Rhizacus or 

 Pergandiella. Apparently this insect Avill form a new genus. 

 Oudablis parietariae (Licht.). 



BoisduvaliaimrktaruB Licht., Bull. Soc. Ent. France, 1881, p. cxv. 



This species has been overlooked by later writers. The c? is 

 clear red; the ? mealy white. It is found on Parietaria diffusa. 



Sugarcane Mealy-bugs. — In the collection of the Division of 

 Entomology at Washington I find mounted specimens of Dacty- 

 lopius calceolarice and D. sacchari from new localities, identified by 

 Mr. T. Pergande. While recording these, I take the opportunity 

 of giving detailed measurements, not hitherto published for these 

 species. It will be seen that although superficially similar and 

 having similar habits, the insects are very distinct in structure. 



Dactylopius calceolariae Mask. 



On sugarcane, Florida, November 7, 1898 (No. 6,832). 

 New to the U. S. 



