Stapliylinidce of the Amazon Valley, 137 



elytris opacis, obsolete parcequc pimctatis ; abdomine seg- 

 mentis basalibus medio infuscatis, parce punctatis. Long. 

 Corp. 4^ lin. 



Mas: tarsis anticis sat dilatatis, abdomine segmento 7" 

 ventrali apice medio minus profunde exciso. 



Antennre short and moderately stout, blackish ; 1st joint 

 pitchy, the extreme base of each of the following joints 

 reddish ; 3rd joint longer than 2nd, 4th rather longer than 

 broad, 8 — 10 rather strongly transverse ; palpi reddish. 

 Head brassy, moderately shining, with two punctures 

 behind the labrum, each placed in a depression, with tAvo 

 or three along the margin of the eye, and some others at 

 the extreme hind angles ; all the middle part impunctate ; 

 it is distinctly narrower than the thorax. Thorax dis- 

 tinctly longer than broad, a good deal narrower than the 

 elytra, along the middle of an obscure aeneous colour, the 

 sides and base yellowish ; it is distinctly sinuate at the sides 

 and a little narrowed behind; on each side the middle, 

 at some distance from the front, is a single pimcture, 

 and two or three others at each front angle, elsewhere 

 impunctate. Elytra not longer than the thorax, of a 

 yellow colour, opaque, sparingly and very obsoletely punc- 

 tured, and with scanty fine hairs. Hind body yellowish, 

 Avith the middle of the basal segments infuscate, sparingly 

 and finely punctured, and scantily pubescent, at each hind 

 angle of each segment Avith a long black seta ; anal styles 

 taAvny yelloAv. Legs yellow, with concolorous spines; 

 basal joint of hind tarsus as long as the three following 

 together. 



In the male the front tarsi are moderately dilated and 

 furnished beneath Avith pale pubescence ; the hind margin 

 of the ventral plate of the 7th segment bears a small notch 

 in the middle. 



A single specimen Avas brought back by Mr. Bates 

 without any special indication of its locality. 



2. Gastrisus IcBvigatus, n. sp. Subdepressus, rufo- 

 testaceus, capite supra £eneo-micante, antennis fuscis. 

 Long. corp. 5 lin. 



Mas latet. 



Fem. tarsis anticis sat dilatatis. 



Antennaa shorter than the head and thorax, moderately 

 stout, the basal joint pitchy red, the rest fuscous ; 3rd joint 

 a little longer than 2ud; 4th and oth each about as long 



