NATURAL HISTORY SOCIETY OF GLASGOW. 17 



The head is broader than long by about a half: the ocelli 

 are moderately large and usually dull brown coloured ; the front 

 projecting ; a little below the antennae there are two small 

 depressions. The clypeus is small, emarginated in front, and in 

 one species (C. viminalis) minutely toothed ; the labrum is small, 

 usually semi-circular, and hairy at the apex. In the male the 

 clypeus is considerably more of an angustate form ; and the 

 labrum is smaller. The mandibles are armed with a projecting, 

 somewhat bluntly pointed, apical tooth, and on the lateral 

 surface of the anterior part there are a number of minute 

 teeth. In C. viminalis, instead of these minute teeth there are 

 two slightly larger, at the base of the large terminal one. The 

 labial palpi are 4-jointed ; the first is about \ shorter than the 2d, 

 which is the longest ; the 3d is about the size of the 1st ; the 

 4th is a little shorter than the 2d, and bluntly pointed. The 

 ligula has its middle division short, a very little longer than 

 broad ; the lateral portions are small and similarly shaped. In 

 the maxillary palpus the 1st joint is stumpy and minute, almost as 

 broad as long; the second is a little longer and considerably 

 thinner; the third about three and a half times longer than the 

 2d, it being especially thick in the centre, tapering towards the 

 base and apex ; the 4th thin at the base, thicker at the apex, and 

 a very little shorter than the 2d ; the 5th, somewhat longer than 

 the 3d, increasing in thickness towards the top ; the terminal 

 joint is not so thick at the apex as the 5th, and is about the same 

 length. The inner lobe of the maxilla ends in a blunt, slightly- 

 curved point, the outer in a roundish, flat, disc-like projection. 



In the body form Cladius does not differ essentially from 

 Hylotoma and Lophyrus ; the abdomen is more cylindrical, more 

 elongated, with the apex more sharply pointed. The scutellum is 

 flat ; the cerci are longish. In the male the abdomen is longer, 

 thinner, and more acute ; the blotch is usually conspicuous. The 

 saw is well developed, nearly a line long, and of considerable 

 breadth and elevation, with the sides beset with seven or more 

 rows of jagged, irregular teeth. 



The feet are slim, with the calcaria moderately long, the inner 

 one beino; one fourth lono;er than the outer. The middle tooth of 

 the claw is bifid ; the tarsal laminae large. 



The egg is oval, white, and as a rule is deposited in the leaf- 

 stalk. 



VOL. III. B 



