igoo] ENTOMOLOGICAL NEWS. 425 



H. pruniosiis was observed from July 2ist to August 3d of 

 the past Summer. It occurred in small swarms along the 

 shores of Buzzards Bay between the "neck" at Woods Holl 

 and Ouisset Harbor. The insects ran about between tides on 

 the wet sand and over the barnacle-coated rocks or flew about 

 in the "thatch-grass," often in the spray of the breakers. 

 Their flight was peculiar and unlike that of any Dolichopodid 

 known to me, being very rapid and in straight lines for a little 

 over a yard at a stretch. Their wings, which have the appear- 

 ance of ground glass, render them quite conspicuous, so that I 

 could sometimes capture them on the wing. Like the species 

 of Hvdrophorus they are not easily captured while running. 



It thus appears that Hypocharassus , so far as its habits are 

 concerned, is to be placed with the maritime Dolichopodid, 

 genera Thinophilus, Aphrosylus, Machasrium and Epithalassius, 

 an interesting genus described by Mik.* I believe that the 

 larva of the Hypocharassus lives in the salt water like that of 

 Aphrosvlus'\ for one of the females of H. pruinosus captured by 

 me at low water mark w T as still soft and had evidently just 

 emerged from its pupa. 



ASPIDIOTUS DIFFINIS. 



Another Scale Insect of Probable European Origin Recently Found in 



North America. 



By C. L. MARLATT, Washington, D. C. 

 The species named above was described by Mr. Robert 

 Newstead ( J^utomological Monthly Magazine, volume XXIX, 

 August, 1893, pages 186-187) as Aspidiotus ajfinis from the ma- 

 terial on an undetermined woody plant sent by a correspondent 

 from the Botanical Garden of Demerara, British Guiana. The 

 material had been sent to Mr. J. W. Douglas during the pre- 

 ceding year, and handed by the latter to Mr. Newstead for 

 study. Later (1. c. page 281), December, 1893, Mr. Newstead 

 corrected the name from a f fin is to diffntis, the former name 



* Mik, Jos., Epithalassius sancti marci, ein neues Dipteron aus Venedig VVien. Ent. 

 Zeitung, 10. Jahrg., 5. Heft., 12. Juni, 1891, pp. 186-187, and Mik. Jos., Vorlaufige Notiz iiber 

 Epithalassius Blasigii, ein neues Dipteron aus Venedig., ibid 31, Juli, 1891, pp. 216-217. 



t See Wheeler, W. M., A Genus of Maritime Dolichopodidae New to America, Pro- 

 ceed Gala. Acad. Science, 3rd ser., Zool., Vol. I, No. 4, 1897, pp. 145-152., PI. IV. 



