98 IM-'nl 



" Tlie single specimen is a new species of tlie genus Encyrtus. Many species of 

 Encyrtus have been described from Europe, but this seems to differ from all. It 

 comes closest to Encyrtus lineola, Mayr, but is separated by distinct characters. The 

 other specimens were a Pachyneuron (of the same species as the two from Lecanium 

 fuscum), which I cannot determine specifically." 



Early in August Mr. Newstead found among some scales of L. 

 distinguendum that he had collected two Rhyncophorous beetles, Bra- 

 chytarsus varius, F., which species, as well as B. scahrosus, F., are well 

 known to feed, when in the larva state, on various Coccidce. .Among 

 other authors Dalman (K. Vetensk. Acad. Handl., f. 1S25, p. 3G8), 

 writing of his Coccus cypraeohi^ says : — 



" Besides several species of Pteromalince which infest this Coccid, anothernoxious 

 parasite is found in it, viz., Anthribus varius, as I have often had occasion to observe. 

 I have also since found in another Coccus a rarer species of Anthribus — A. scabrosus. 

 These two species appear to form a true gei\us distinct from Anthribus." 



PULVINAEIA BETUL^. 



Coccus betulcB, Linn., F. S., 1017 ; S. N., 740, 7. Fab., Sp. Ins., 394, 8 ; Mantiss., 

 ii, 319, 10 ; Ent. Syst., iv, 226, 12 ; Syst. Rhyng., 308. Modeer, Act. G-oth., 

 i, 23, 16 ; Gmel., Syst. Nat., i, 4, 2216, 7. De Villers, 560, 5. Puhinaria 

 betulce, Sign., Ess. Cochen., p. 207. 

 9 adult. Scale broad, obcordate, nearly as broad as long, slightly convex, 

 shining, dark piceous-brown, the marginal area broadly (band-form) rufo-testaceous 

 (this coloration probably not constant) ; the disc scarcely punctate, but with two 

 or three slight transverse ridges ; the marginal band ■with several very slight equi- 

 distant transverse lines ; the posterior edge widely but shallowly emarginate, the 

 sides of the notch divergently rounded off from the narrow, close, rather long anal 

 cleft ; the white cottony ovisac ample, raising the scale, extending a little beyond 

 it at the sides and very much behind. Antennae of 8 joints (fig. oa) ; Ist very broad, 

 short, with a few hairs ; 2nd not so thick, a little longei* ; the rest more slender ; 3rd 

 longest of all, with one hair ; 4th and 5th much shorter, subequal, each with one 

 hair ; 6th and 7th still shorter, subequal, with one or two hairs ; 8th about the same 

 length, pointed, sides gradate, with several long hairs, of which one (apical) is longer 

 than the others. Legs stout (fig. 5b) ; tibiae with two hairs near the apex ; tarsi 

 obtuse at apex, more than half the length of tibiae, with two long finely capitate 

 digitules ; claw long, strong, with two shorter digitules dilated at the extremity. 



Length, 5, breadth, 5 mm. 



Described from one of two examples found on birch trees (Betula 

 alba) at Delamere Forest, July 20th, 1890, by Mr. R. New^stead, who 

 has kindly furnished the figures. 



Signoret (Z. e.) cites the authorities given above, and describes 

 Pulvinaria hetulcB as the Coccns heiulce of Lmne, but he gives only the 

 characters of the ? scale, thus : — 



" In the most advanced state this species much resembles P. vitis, which, for 

 the sake of comparison, we take as the type of the genus. It is almost as long as 



