Staplujlinidcc of tlie Amazon Valley. 169 



6. Philonthus ceneiceps, n. sp. Rnftis, capite teneo, niti- 

 dissimo, abdomine ante apicein nigro. Long. corp. 3^, lin. 



]\Ias : capite majore, femoribus anticis spinnlosis, abdo- 

 mine segmento 7° ventrali medio prodncto, ante apicem 

 leviter transversim impresso, tarsis anticis simplicibus. 



Antennas nearly as long as the head and thorax, yellow- 

 ish; 2nd and 3rd joints abont eqnal, 4 — 10 each a little 

 shorter than its predecessor, none of them transverse. 

 INIandibles and palpi yellowish. Head on the upper side 

 shining brassy, the front Avith a medial longitudinal im- 

 pression, on which are placed two large continent punc- 

 tures, and on each side of this Avith tliree punctures, form- 

 ing an irregular row between the eyes, and Avith eight or 

 ten other large punctures on each side at the back part. 

 Thorax rather longer than broad, slightly nan-owed behind, 

 the sides a little sinuate ; it is of a shining reddish-yellow 

 colour, with a dorsal row of five coarse punctures on each 

 side the middle, and Avith six or seven other large punc- 

 tures on each side, near the front. Scutellum pitchy, the 

 basal part rather coarsely punctured, the a]3ex impnnctate. 

 The broad elytra are al^out as long as the thorax, of a 

 shining-yellowish colour, coarsely and sparingly punc- 

 tured. The hind body is but little narroAved to the extre- 

 mity ; it is of a broAvnish-yelloAV colour, with the 5th and 

 6th seo'ments black, the extremitv of the latter and the 

 7th segment pale yellow, the hind portion of the anal styles 

 broAvnish ; segments 2 — 4 are sparingly and finely punc- 

 tured, 5 and 6 much more closely punctured, these latter 

 Avith a coarse, depressed, black pubescence. The legs are 

 yelloAV, the intermediate coxjb distant. 



In the male the hind portion of the ventral plate of the 

 7th segment is produced in the middle ; the produced part 

 is truncate at the extremity, and a little transversely im- 

 pressed before this ; in front of this depression are inserted 

 six or eight fine depressed seta3. 



In the female the head is only as broad as the thorax, 

 and the fi'ont femora are unarmed. 

 Ega; tAvo specimens, S and ?. 



7. PlulontliMs co(/7iatus, n. sp. Rufns, capite <Tneo, niti- 

 dissimo, abdomine ante apicem nigro. Long. corp. 3h lin. 



Mas: capite majore, femoribus anticis spinidosis, abdo- 

 mine segmento ventrali apice leviter product© medio an- 

 guste sed profnnde triangulariter inciso, tarsis anticis 

 simplicibus. 



