202 MYTILASPIS POMOEUM. 



white scale, which I found a few days ago on hawthorn 

 here. Do you think it is a distinct species or only a 

 var. of M. pomorum ? Irrespective of the colour, the 

 texture of the scale appears to me to be rather 

 different." 



MYTILASPIS EICUS (Signoret). 

 (PI. XXVI, fig. 3 ; PI. XXVII, fig. 7.) 

 Mytilaspis ficus, Signoret; Essai, p. 138. 



Puparium of adult female elongate, straight or 

 curved ; but narrower and less dilated at posterior ex- 

 tremity than in M. pomoruni. Pale orange-brown, 

 anterior half dark red-brown or castaneous, posterior 

 extremity paler. Larval exuviae yellowish-brown or 

 orange-brown ; second exuviae small, shining orange- 

 brown, posterior extremity paler. Secretionary 

 covering dark red-brown ; laminge grey at the edges, 

 and the whole puparium is frequently farinose. Ventral 

 scale complete, but usually ruptures along the centre 

 from end to end on removal from the bark. 



Average length 2 mm. 



Adult female more elongate and smaller than either 

 of the preceding species. Segmentation resembling 

 M. pomoriim. Rudimentary antennas with two slender 

 curved spines. Anterior par astigmatic glands average 

 about three, posterior groups absent. Dermis, from 

 just below the rostrum to last free abdominal segment, 

 thickly set with short tubular spinnerets, with the 

 inner capitate extremity broad as in Chionaspis biclavis. 

 Each abdominal segment at margin with 3 4 short 

 spiny plates, many of which are suddenly dilated to- 

 wards the base. ' Pygidium (PL XXVI, fig. 3) with 

 five groups of circumgenital glands, of which the three 

 anterior groups are more or less continuous ; the 

 anterior group consists of from 4 to 6, are arranged in 



