198 [August, 



which are more numerous and crowded towards the posterior extremity of the 

 body, the terminal segment being almost evenly covered with them. 



Genital aperture on venter of terminal segment. Anal orifice simple, 

 encircled by a stout chitinous ring, opening on the extreme posterior margin 

 (fig- 6). 



There are small series of stout setse on the venter of all the segments, with 

 the exception of the first and last segments of the abdomen (see fig. 1). 



Length of extended body from 4.5 to 6 mm. Breadth across base of 

 abdomen, 1.5 mm. 



Colour of shrivelled insect, blackish or slaty brown. 



During oviposition the body of the female becomes greatly 

 shrivelled and covered with a white woolly secretion, which is 

 eventually extended as a loose ovisac of from 4 to 6 mm. in length. 

 At the completion of the egg-laying process the female insect is 

 reduced to a length of 1 mm. or less, the body becoming completely 

 telescoped. 



Eggs and young larvae very pale yellow. Length approximately 

 0.25 mm. 



The larva is of a regular oval form, the body terminating in two 

 short setae. Antennae 6-jointed ; basal joint large and broad ; 2nd, 

 3rd and 4th smallest ; 5th larger, broadly dilated ; 6th longest, tapering 

 to the extremity. Claw with 2 digitules (fine knobbed hairs). Rostrum 

 conspicuous. A long stout seta projects laterally on each side of the 

 body, on a level with the base of the rostrum. Thoracic spiracles (4) 

 large and conspicuous; no abdominal spiracles. 



Subsequent stages of the female have not been observed. They 

 may be expected to occur, buried in the inner tissues of the bark, in an 

 encysted form, without limbs or antennae. 



A few empty male puparia were found, entangled in the ovisacs of 

 the female. They are in the form of rather closely felted narrow 

 cocoons, 1.5 mm. in length. 



Larval exuviae of the male exhibit short conical antennae of 7 

 joints, each with many long stout bristles. The apical joint broadly 

 oval, the others mere chitinous rings decreasing in size from the basal 

 joint, which is about as broad as the length of the apical joint. Derm 

 with many large multilocular spinnerets and stout setae. Claw with 4 

 or more stout knobbed digitules. 



When discovered, on the 20th June, the females were already 



