Staph ylinidoi of the Amazon Valley. 115 



In the male the 6th segment of the hind body beneath 

 is a little emarginate behind. The 7th segment has the 

 hind part much produced and pointed, and is compressed 

 in a keel-like manner as it approaches the extremity. 



Ega ; four male individuals. 



Obs. — Besides these four males, I have a single indi- 

 vidual from the same locality, -which I believe to be the 

 female of B. Batesi ; the ventral plate of the 7th segment 

 is distinctly produced, and its hind margin is simply 

 rounded ; the antennas are slightly shorter and more cla- 

 vate than in the other sex. 



8. Brachydirus lonyipes, n. sp. Fulvus, abdomine 

 capiteque superne nigris, illo apice testaceo, hoc vertice 

 fulvo ; antennis fuscis. Long. corp. 4i lin. 



Mas latet. 



Antenme short, thickened towards the extremity, 

 blackish, the base of the 1st joint yellowish ; 5th and 6th 

 joints small and short, but scarcely transverse, 7 — 10 

 rather strongly- transverse. Palpi and mandibles dark. 

 Head above black, with the vertex fulvous, coarsely and 

 very densely punctured, the vertex more sparingly than 

 the front part. Thorax tawny, with the very coarse and 

 close punctures distributed in the usual manner. Elytra 

 rather longer than the thorax, rather coarsely punctured, 

 similar in colour to the thorax. Hind body black, with 

 the 7th segment and hind part of the 6th yellow, the 

 styles of the 8th segment dark tawny ; segments 4, 5 and 6 

 are rather closely punctured, and 4 and 5 bear pale hairs, 

 as also do 2 and 3 near the lateral margins. Legs yel- 

 lowish, with the femora, except at the knees, slightly in- 

 fuscate ; front legs rather long and slender. 



In the female the hind margin of the ventral plate of 

 the 7th segment is simply rounded. 



Para ; a single female. 



Obs. — Though closely allied to B. Batesi, I have no 

 doubt this is a distinct species ; the antennas are shorter 

 and darker in colour at the base, the black colour covers 

 a larger portion of the head, which also is more densely 

 punctured, the coarse ])unctures of the thorax are more 

 crowded together, and the anal styles are paler in colour. 



9. Brachydirus aneiceps, n. sp. Fulvus, capite supra 

 (vertice excepto) asnescente, abdomine nigro, apice tes- 

 taceo. Long. Corp. 3|^ lin. 



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