Stajjhylinidce of the Amazon Valley. 199 



scribed, and it is in tliis part of the world that the largest 

 and most brilliant of the forms included in the genus are 

 found. 



1. Sfap/i!/lin?cs rutllus, Pertj. 



Para, Ega, Tapajos. 



The fine series broncrht back bv Mr. Bates of this 

 species show that it varies much in size, large individuals 

 being 9 lin. in length, and the smallest only about 5 lin. ; 

 the yellow colour of the extremity of the hind body is in 

 the larger individuals nearly entirely absent. 



2. JEub'ssus Mannerheimii, Lap. 



Para, Tapajos, Ega. 



This species, recorded hitherto only from Cayenne, ap- 

 pears to be not uncommon in the Amazon valley. 



3. XaJitholinus bicolor, n. sp. Fulvus, nitidus, capite 

 nigerrimo, minus crebre punctato, medio la^vi ; prothorace 

 serie dorsali subtiliter bi- vel tri-punctato, propeque angulos 

 anteriores parce punctato ; elytris subtiliter punctatis. 

 Long. corp. 7 lin. 



Slightly larger than A^. glahratus, of a shining-tawny 

 colour, elytra rather paler and the head black. Antennfe 

 with the three basal joints dark red, the rest pitchy ; the 

 11th joint yellowish at the extremity; 3rd joint nearly 

 twice as long as 2nd; joints 4 — 10 scarcely differing from 

 one another in length, and only very slightly in width, 

 transverse ; lltli joint pointed, about twice as long as the 

 10th. Palpi reddish. Mandibles short, stout, black, 

 pitchy at the base; labrum considerably advanced, rounded 

 in front, Avith a deep narrow division in the middle, appa- 

 rently entirely horny. Head rather broader than the 

 thorax, about as broad as the elytra, a little narrowed in 

 front, black and shining, the disc impunctate ; the sides 

 and the imder surface sparingly and rather finely punc- 

 tured. Thorax rather narrower than the elytra, consider- 

 ably longer than broad, narrowed behind, very shining 

 reddish-tawny ; a little in front of the middle on each side 

 is a single puncture, and behind this 1 — 3 others ; there 

 are also five or six larger punctures near the front angle 

 on each side. Scutelhnn obsoletely punctured. Elytra as 

 long as the thorax, yellow, rather sparingly and finely 

 puuctu)-ed, the punctures arranged in indistinct lines. 



