NOTES ON CILLENUM LATERALE. 



253 



very little thickened externally ; the 2d joint the longest, clavate ; 

 1st nearly as long and more robust, cylindric ; 3d shorter, obconic ; 

 those which follow very short globose, the exterior ones gradually 

 broader and oblate ; the last again longer globose-ovate : labrum 

 transversely quadrangular, a little hollowed out in front : mandi- 

 bles produced beyond the labrum, slender, acute, the tip slightlj, 

 incurved, a small tooth on the inside beyond the middle : maxilla? 

 very long, the junction of the scape and stern projecting in an 

 angle from the cheek ; the blades very slender, the outer setaceous, 

 with its first joint short ; the inner acute and slightly incurved at 

 the extremity ; the inside bordered sparingly with minute spines : 

 palpi about as long as the head, slender ; the 1st joint minute, the 

 2d and 3d of equal length, the latter slightly clavate, 4th entirely 

 concealed : mentum transversely quadrangular, narrowed in front, 



with the margin straight : ligula ? palpi represented by 



two parallel spines, so long as to pass beyond the extremity of the 

 mandibles : thorax narrower than the head or elytra, longer than 

 broad, narrowed behind (oblong-obcordate) ; elytra together, 

 almost quadrate, the posterior angle not evidently notched : wings 

 none : abdomen nearly as long as the rest of the body, linear, 

 only the last two segments tapering : legs not long, shanks pu- 

 bescent, foreshanks notched and spinous at the tip : fore feet ex- 

 ceedingly short, the joints scarcely distinct : hind feet not half as 

 long as the shank, four-jointed, the last joint shorter than the 

 first, but more robust ; the claws strong and hooked. 



Habitat in arenis maritimis (Hiberniae) aestu alterno opertus et 

 retectus. 



A. H.H. 



Fig. a. Diglossa mersa. b — e. Details of the mouth. 



/. Fore leg. g. Hind foot. h: A claw. 



NO. III. VOL; IV. L L 



