108 



CHAS. K. BRAIN. 



In Calycicoccus the body of the adult $ terminates in a distinct cone with numerous 

 very stout conical spines. The galls of the four species may be distinguished as 

 follows : — 



Gall on stem, flatly rounded and blister-like, about 3 mm. in diameter (fig. 75) 



Amorphococcus. 

 Gall on leaf, normally flatly conical, about 3 mm. in diameter (fig. 73) 



Calycicoccus. 

 Gall on margin of leaf, pitcher-shaped, about 6 mm. long (fig. 76) . . Grewiacoccus. 

 Gall on stems, large, about 10-12 mm. long, broad, truncate pear-shaped (fig. 74) 



Cissococcus. 

 Sub-famihy Pseudococcinae. 

 Genus Grewiacoccus, g.n. 



A Pseudococcine genus in which the adult $ is enclosed in a blunt leaf-gall (fig. 76). 

 Two or three adult females may be found in the same gall. 



Adult $ with legs and antennae, of normal form but small, and an anal ring with 

 six hairs which surround a short, stout, hollow cone. Anal tubercles not produced, 

 but represented by single setae. Scattered over the body are small gland pores, 

 many of which are furnished with spear-head-shaped spines ; on the posterior portion 

 of the body these are extremely numerous ; the anterior part has comparatively few. 



Type, G. gregalis, sp.n. 



64. Grewiacoccus gregalis, sp. n. (Plate iv, figs. 76-76cZ). 



Adult $ causing a gall on the leaf of the host-plant, in which one, two or three 

 insects may be present. The galls may be solitary, or, as is often the case, five to 

 twelve may be found clustered around the edge of a single leaf. The mature gall 

 is about 6 mm. in length, broadly inflated, with the sides tapering slightly to the 

 neck, of a scrotal shape or one very much like a pitcher (fig. 76). The galls stand 

 nearly erect from the distorted edge, and are of the same green colour and texture as 

 the leaf. There is no hole at the distal end, but below, on the under-side of the leaf, 

 is a circular opening through which project two dense white filaments accompanied 

 by a small amount of fine white cottony matter. When obtained in January numerous 

 young were found clustered around the necks of some of the galls. All the available 

 space in the gall is occupied by the female — or females if there are two or three — 

 and on the inner walls there is a slight layer of white wax, which is more plentiful 

 near the base, or where the posterior part of the insect is. On some leaves small 

 slender galls (fig. 76) were observed, but these were always empty in cases examined. 



Adult $, when alive, yellowish or slightly pink, about 3 2 mm. long, broadly rounded 

 in front and tapering behind ; segmentation distinct. When stained and mounted 

 the $ is long, with nearly parallel sides and has the two extremities almost equally 

 rounded. The integument is almost clear, except that of the posterior segments ; 

 these are richly supplied with gland-pores, from the majority of which spear-shaped 

 and slightly pigmented spines arise (fig. 766). On the anterior parts of the body 

 the gland-pores are few in number and scattered. They are all small ; some have 

 trilocular orifices, whilst others are simple with a slender spine or hair. The eyes 



