54 T. D. A. cockerf:ll. 



THIRD SERIES. 



Consists of hemispherical species, with the skin more less tessel- 

 hited, living on trees and shrubs in North America and Europe. 

 About twenty-six species are considered valid, but several of these 

 are very closely allied. I have been able to examine the following: 



L. cesculi Koll., Ince, Cheshire (Newstead). 



L. distinguendum Dough, Delaniere Forest, Cheshire (Newstead). 

 One of these has been parasitized. 



L. pyri Schr., Isleworth, Middlesex (Q. M. Fenn). 



L. ribis Fitch, Norfolk (Newstead). On Bibes riibrum Meissen, 

 Saxony, July, 1892 (C. F. Schaufuss). I think this species has not 

 yet been recorded from Germany. 



L. rosarum Snell., on Rosa ceMifolia Meissen, Saxony (Schaufuss) ; 

 also what I take to be the same species on Prunus domestica Meissen 

 (Schaufuss). 



L. t'dke L., on Tilia grandifolia, Oberblasewitz, 1890 (Schaufuss). 

 This species, cesculi, and ulmi, are very nmch alike. Although it 

 was two years since the Oberblasewitz scales were collected, I found, 

 on crushing a scale for examination, a very small colorless mite, 

 alive and walking about! Could it have been with the scale all 

 this time, or do these mites breed in old scales? 



L. ulmi L., Ince, Cheshire (Newstead). 



The group represented by the third series is distinct enough to 

 receive a subgeneric name, and may be called Eulecaniwn, taking 

 L. tili(e as the type. 



FOURTH AND FIFTH SERIES. 



So far as I know the species of these two series, they are strictly 

 of one group, the only difference being that in the fifth series the 

 characteristic ridges are seen in the adults, while in the fourth series 

 they are only well seen in young scales. Mr. Ashmead named the 

 group Bermirdia, taking L. olere as the type ; in a letter to the U. S. 

 Department of Agriculture, I changed this name to Neobeniardia, on 

 account of preoccupation in botany, but concerning this, see " Journ. 

 Inst. Jamaica," 1892, p. 142. It appears, however, that the name 

 Sametia was formerly used for L. coffece (see " Zool. Record" for 1865), 

 and if it can now be taken up, it has priority. 



