302 Sir S. Saunders' Notes on the 



within the ventral recess. Fig. 3 gives the residuarj' 

 portion of the ventral region in the foregoing ; consisting 

 of the hypopygium (Sichel) intimately associated with the 

 terehra and its appendages, whose sheaths are here 

 withdrawn from the former and separated, showing the 

 terehra with its spiculae in the intermediate space. Thus 

 the hypopygium extends to the apex, in the absence of 

 the usually projecting terebral sheaths ; which, narrow 

 at their origin and laterally compressed, gradually widen 

 beyond their centre, changing colour from rufo-flavous 

 to jet-black. At the basal extremity of the abdomen the 

 subjacent terebral sheaths are refiexed back upon the 

 dorsum, where the latter are dilated into two oval lateral 

 circuits ; beyond which, on the dorsal region, the 

 epipygium, usually firmly attached to the impunctate 

 transverse belt of the hypopj^gium, as if appertaining 

 thereto, is here partially raised to exhibit the com- 

 ponent parts of the latter; whose spiracles, on either 

 side of its carinated apex, in other instances oval, are 

 here circular, and closely follow the aforesaid belt, as in 

 fig. 6. 



The ventral region, reversed and seen laterally, is 

 shown entire in fig. 4 ; the terehra reposing within the 

 elongate channel of the hypopygium and its closed 

 sheaths projecting to the extreme apex. The epij^j^gium 

 has also been retained in situ above. In fig. 5 the 

 ventral region reversed is seen from behind, showing 

 the basal recess; the terehra with its spicules being alone 

 displayed, and its sheaths closed. The terminal portion 

 of the same, seen from above, is shown in fig. 6, 

 commencing with the impunctate transverse belt of the 

 hypopygium, and terminating with the terebral sheaths. 

 These sheaths, together with the terehra and its 

 spiculae fully displayed, are exhibited in fig. 7. The 

 abdomen of the male, as seen from below, and the 

 terminal segments of the same seen from above, are 

 represented in figs. 8 and 9, and the corresponding 

 segments of the female, as seen intact from above, 

 are exhibited in fig. 10, commencing with the 5th; 

 the last dorsal segment {epipygium, Sichel) being next in 

 succession ; closely followed by the impunctate belt of 

 the terminal ventral segment {hypopygium, Sichel), and 

 by the spiracles of the latter, separated inter se by the 

 carinated ridge extending to its apex ; the closed sheaths 

 of the oviduct projecting beyond, with the extremity of 



