1887.] 105 



ceases. In Bedeli the frontal stria is raised, nearly semicircular, and 

 not interrupted in front, and the thoracic punctures are scattered 

 irregularly and only a few are oeellatcd ; it is also sub-rotundate in 

 outline. 



Mr. Walker captured on the same day Hetcerius araehnoides, 

 Fairm., hut this was associated with an "active slender black ant," 

 and I regret I cannot at present give the specific names of the Formi- 

 cidcB. There are now ten species of Setcerius known from the 

 southern border of the Mediterranean. 



Wimbledon : 



November 15ih, 18S7. 



NOTE ON SOME BRITISH COCCID^. (No. 8). 



BY J. W. DOUGLAS, F.E.S. 



{^Concluded from •page 101). 



Lecanium gibberum. 



Coccus gilher, Dalman, K. Vet. Ac. Handl. for 1825, p. 366, 4, tab. iv, fig. 6—12 



(1826). Westwood, Introd. Mod. Class. Ins., ii, fig. 118, 18. 

 Lecanium gibber, Sign., Ess. Cocbin., p. 252, pi. i, fig. 8, pi. xi, fig. ]9. 



? . Irregularly spheroidal, the curve of the upper portion interrupted in the 

 middle by a shallow yet wide longitudinal sulcation, thus causing on each side of it 

 a rounded bulge or gibbosity, whence the curve of the sides is less than if the figure 

 were a true spheroid ; the base is of considerable size, varying in form and dimension 

 to fit the inequalities of the surface of the young terminal branch to which it is 

 attached ; surface smooth, punctured round the base ; colour pale fuscous, with a 

 median, indented, yellowish band ; eventually one of my two examples became 

 reddish-brown. AntennsB (now first described) of six joints, in every respect pre- 

 cisely the same as in L.fuscum {c.f. fig.). Diam., 5, height, 4'50 mm. 



Male unknown. 



Dalman (I. c.) describes the species thus : — 



" Femina vctusta valde turgida, gibba ; brunnea, Isevis, nitida ; apertura retusa 

 obovata. 



" Superficies leevis, non vel obsolete tantum punctulata." 



He states that the scales are found on aspen, birch, hazel, and 

 other trees, and that their form varies much according to the configu- 

 ration of the site. He gives several examples ; my two specimens 

 agree best with his fig. 8, and with Signoret's pi. xi, fig. 19. 



Siguoret (Z. c.) describes the single example he obtained from an 

 alder tree in Austria, saying of Dalman's type — " II forme une masse 

 composee de deux boules reunies." He thinks that Dalman has con- 

 founded several species together, because there is too much difference 

 among them to be considered as one only, more especially as they live 

 on different trees. 



