292 Mr. D. Shai'p's Cuntrihutions to the 



Kxtremcly closely allied to S. amicus, but readily dis- 

 tinguished by the colour of the elytra, each of which has 

 the outside occupied by a large black ])atch, which does 

 not quite reach the apex ; the suture also very narrowly 

 blackish, the space between these black marks, ^s well as 

 the apex, yellow. It is also rather more slender than 

 iS*. amicus, and the male characters are ditferent. 



In the male the ventral plate of the 6tli segment of the 

 liind body has a broad longitudinal impression on the 

 middle, its hind margin being quite simple ; the hinder 

 ])art of the ventral plate of the next segment bears a 

 rather deep excision. 



Tapajos ; three males, two females. 



.3. Snnius serpens, n. sp. Augustus, tcstaceus, elytris 

 macula media abdomincque segmento 6° fuscis; dense 

 punctatus, opacus; abdomiue apicem versus latiore. Long. 

 Corp. 1| lin. 



Antennre not quite as long as head and thorax, pale 

 yellow; 1st joint hardly longer than 3rd; 3rd much longer 

 than 2nd, 4 — 6 differing little fi-om one another; 7 — 10 

 each slightly shorter and scarcely broader than its pre- 

 decessor, nth distinctly thicker than 10th. Head 

 broader than thorax, quite as broad as elytra, yelloAvish 

 in colour, very densely and indistinctly punctured, dull ; 

 the punctures very shallow, the interstices very tine ; eyes 

 large, placed at the middle of the sides. Thorax longer 

 than broad, a little narrower than the elytra, almost oval, 

 the sides much narrowed behind ; colour and sculpture 

 similar to those of the head. Klvtra naiTOw, rather lonsfer 

 than the thorax ; rather })aler in colour than the other 

 parts, each with a dark oval spot on the middle nearer to 

 the apex than to the base ; rather coarsely but indistinctly 

 and not densely punctured, not so dull as the other parts. 

 Jlind body elongate, very narrow at the base, broader 

 towards the extremity, yellowish ; the 6th segment blackish 

 except at the extremity, quite dull, densely and finely 

 punctured, with a very line dense })ubescencc. Legs very 

 ])ale. 



The male has a rather deep excision at the extremity of 

 the ventral ])late of the 7th segment of the hind body. 



Tai)aj<)s; numerous examples. 



Obs. — This s])ecies greatly resembles the European 

 S. bimaculatus, but is rather more slenderly formed, is of 



