Mai'garodincE. 427 



cephalo-thorax, but aggregated into double transverse bands on the abdominal 

 segments {?,&^fig. 22). Length 3 mm. Breadth 2 mm. 



Adult male {fig. 19) dull brown, darker above. Wings smoky grey (in some 

 examples almost colourless), costal area dull brown or blackish, the costal 

 nervure ending in a diffused fuliginous fascia. Halteres with a single hooked 

 bristle. Eyes dark chocolate brown, moruliform. Antennae ten-jointed, long 

 and slender, strongly pubescent. A sparse tuft of fine silky filaments springs 

 from the dorsum, near the extremity of the abdomen. Examination of a 

 macerated preparation shows that these filaments are produced from short 

 secretory ducts, arranged in two transverse rows {s^^figs. 20, 21). Each seg- 

 ment of the abdomen carries a transverse series of very short setae, springing 

 from comparatively large bases ; and, on each side, two or three compound 

 pores. Length 2 to 2*5 mrn. 



Male nymph elongate ; pale yellow. The short wing-pads are folded along 

 the sides and the ten-jointed antennae turned back on each side of the head. 

 The insect, though possessing well-developed legs, is very sluggish. It rests in 

 crevices of the bark, enveloped in loose cottony secretion. 



The adult females were found wandering upon the stems of Antidesma 

 biinius: Pundaluoya. The anterior half of the body is often thrust into a crevice 

 of the bark. When walking, the abdomen is slightly elevated (see yf?"- i)- When 

 confined in a glass tube, the insects buried themselves in the cork, forcing 

 their way through crevices and holes seemingly much smaller than their own 

 girth and — in some instances — working themselves completely through the 

 cork. 



The seven-jointed antenna of the early larva is an unusual character. It is 

 possible that the larvae may differ sexually in this respect. Unfortunately, the 

 drawing (y^. 18) was made from the only available example of the insect in 

 this stage. 



This insect, in general characters, conforms to the description of Kuwana's 

 genus Sasakia (since renamed Kuivania). The apparent discrepancy in the 

 number of antennal joints is explained in the foregoing notes on the genus. 

 But a more serious difficulty arises with regard to the mouth parts, which are 

 totally wanting in qtierciis (the type of the genus), but are comparatively well 

 developed — though functionless — in zeylanica. In the allied gtxvViS Xylococcus^ 

 however, a similar condition has been observed, different species showing 

 various degrees in the development of these parts. The knobbed hairs on the 

 tibijE are characteristic of quercus also. The only other doubtful point concerns 

 the characters of the males. The male of K. quercus is unknown ; that of 

 zeylanica has compound eyes. But the males of the otherwise closely allied 

 Steingelia gorodetskia have simple eyes. If those of Ktnuania quercus should 

 eventually prove to be of this type, then zeylanica will have to find accommoda- 

 tion elsewhere — in a distinct genus. 



