!St((j)lujliiiul(B of tlie Amazon Vallei/. 423 



TuRELLUs, n. gen. 



Antennas clavatfB, O-articuIata?. 



Tarsi omnes 4-articulati. 



Labrnm ample, corneous ; fi-ont mai-gin rounded and 

 serrated, the serrations being about twenty in number. 

 Mandibles elongate, slender, acutely pointed, strongly 

 curved, with an elongate pointed tooth on the middle of 

 the inner side of each. Maxillary palpi elongate; 1st 

 joint not observed, 2nd joint rather long and slender, two 

 or three times as long as broad : 3rd joint similar to 2nd, 

 but nearly twice as long; 4th joint large, longer than 

 3rd, elongate oval, but a good deal dilated on the inner 

 side about the middle. 



Antennas inserted at the sides of the front, as in 

 Oxytelus, short, 9-jointed; the 1st joint stovit, joints 2 — 7 

 small, each a little shorter than its predecessor ; 8th joint 

 strongly transverse, 9th joint forming a pointed oval club, 

 terminating in sette. Head shaped as in Oxytelus ; the 

 eyes rather small, but prominent. Prothorax strongly 

 transverse, the base cut away on each side at the hind 

 angles ; beneath, the horny portions of the prosternum 

 and sides occupy nearly the Avhole space, so that the front 

 coxas are nearly entirely covered ; they are sm_all, quite 

 contiguous, placed quite at the hind part of the thorax, the 

 openings of their cavities being apparently reduced to two 

 minute, circular, contiguous (? confluent) spaces, without 

 lateral prolongations. jNIiddle coxas minute, nearly con- 

 tiguous, subglobose. Elytra longitudinally costate. Hind 

 body short and broad, much narrowed to the extremity, 

 rather strongly margined, composed of six visible segments. 

 Legs rather small, tibias slender and simple; tarsi short, 

 4-jointed, the three basal joints short, and about equal to 

 one another, the 4th joint rather longer than the three 

 others together. Form of the whole insect — short and 

 broad, flat on the upper side. 



This minute insect, for which I have been obliged to 

 find a new generic name, is perhaps the most interesting 

 of the Staphylbdda discovered by Mr. Bates. Only 

 a single individual was brought back by Mr. Bates, and 

 I have therefore been able to expose its characters only in 

 a very imperfect manner; the lower lip and its appendages 

 and also the maxillas and base of the maxillary palpi have 

 quite eluded my observation, and also I have been able to 

 see only in an imperfect manner the strnxture of the hind 

 parts of the prosternum. Nevertheless, it is evident that 



