OF PSEUDOCOCCIDAE & ERIOCOCCIDAE 27 



(518-658, av. 6o2[x long), and the largest the winged males of G. spuria (1442-1512, 

 av. i484[i long). 



Colour. The living specimens show a larger variation in colour than in Pseudo- 

 coccidae ; sometimes they are light yellowish (P. fraxini), light brown (E. 

 araucariae) or dark red (0. agavium). Some of the material was alcohol-preserved 

 (Gossyparia spp.), or already mounted on slides in " Berlese fluid " (E. orariensis), 

 or dry samples (E. buxi), whose normal colour had changed. 



Derm Vestiture. Body setae : The hair-like setae are present on the body and 

 on the appendages ; the fleshy setae may occur on the antennae only (e.g. Gossy- 

 paria spp.) or on the antennae and the legs (Eriococcus spp.), but are always absent 

 on the body itself. 



Disc pores : These are entirely absent. 



Organs of unknown homology : Peculiar organs (X) appearing as small, irregularly 

 oval or rounded discs, occur dorsally on each side of the midcranial ridge in some 

 species (E. araucariae and Gossyparia spp.) ; a histological study is required to 

 elucidate their obscure nature, which however was beyond the scope of the present 

 work. 



MACROPTEROUS MALES 



Head 



Head capsule : In front view, the head is usually more or less rounded, but 

 sometimes subtriangular (E. buxi). The ventral preocular depression is hardly 

 indicated (Eriococcus spp.) or entirely absent (Gossyparia spp.). The arms of the 

 midcranial ridge are always joined together at the apex of the head forming a 

 cruciform structure ; the dorsal arm fades away well before reaching the post- 

 occipital ridge (por). The latter is comparatively strong and well developed, with 

 the lateral ends distinctly forked. The pre- and the postocular ridges (procr & pocr) 

 are widely separated, and the interocular ridge is absent ; in E. buxi, the ventral 

 part of the preocular ridge is reduced. The corneae of the dorsal and the ventral 

 simple eyes (dse & vse) are usually subequal in diameter. The lateral pair of ocelli 

 (o) are usually well developed and close to the postocular ridges ; in 0. agavium, 

 they are reduced to small spots only, and attached to the postocular ridges by 

 means of short sclerotized arms. The cranial apophysis (ca) is apically bifurcate, 

 except in E. buxi where it is truncate. The tentorial bridge (tb) is comparatively 

 stout ; the anterior tentorial arms (ata) are not fused, each joining the cranial 

 apophysis separately. A small mouth tubercle (mt) sometimes occurs just behind 

 the preoral ridge (pror) (e.g. 0. agavium, Text-figs. 45 & 46). 



The same groups of head setae which occur in Pseudococcidae are also present 

 in Eriococcidae. 



Antennae 



The flagellar segments are comparatively short and barrel-shaped, and some- 



