TETRAPEDIA. 129 



testaceous ; the apical joint of the tarsi ferruginous ; the pubescence 

 on the legs black, with a little white at the apex of the posterior 

 tibiae ; the first joint of the posterior tarsi with fulvous pubescence 

 within. 



Male. Exactly resembles the female, and, as in that sex, has the 

 legs obscurely ferruginous beneath. 



Hab. Amazons, Ega and Tunantins. 



4. Tetrapedia basalis. 



Female. Length 4| lines. — Black ; the abdomen very smooth and 

 shining. A little white pubescence on the sides of the face and 

 also at the insertion of the antennae ; the clypeus with a few distant 

 punctures, its anterior margin slightly emarginate ; the tips of the 

 mandibles pale testaceous ; the flagellum of the antennae, except 

 the three basal joints, obscurely fulvous beneath. The mesothorax 

 shining and punctured ; the wings, from the base to the stigma, 

 dark brown, the apical portion milky white ; the legs with black 

 pubescence, that on the posterior tibiae and first joint of the tarsi 

 very dense and long. Abdomen pubescent at the apex ; beneath, 

 the third and fourth segments with pale fulvous pubescence, that 

 on the apical segments black. 



Hab. Brazil, Fontiboa. 



5. Tetrapedia plumipes. 



Female. Length 4| lines. — The head and thorax black, the abdo- 

 men yellow, with black markings : legs pale ferruginous. The 

 clypeus, labrum, and mandibles yellow; the last black at their 

 tips ; antennae ferruginous ; the base of the clypeus more or less 

 black ; the front with short pale fulvous pubescence, the clypeus 

 naked. The thorax above with short fulvous pubescence, that on 

 the sides and beneath paler ; wings hyaline, the nervures, stigma, 

 and tegulae pale ferruginous ; the pubescence on the legs fulvous, 

 that on posterior pair long and dense, as in Dasyjpoda hirtipes. Ab- 

 domen oblong ; the basal segment with four ovate black spots, two 

 placed laterally and near the apical margin of the segment, and 

 two minute ones in a line with the others ; at the basal margin of 

 the other segments a broad black fascia, which emits a semicircular 

 black mark on each side, in a line with the two ovate black spots 

 on the basal segment ; beneath yellow. 



Hab. Amazons, Ega. 



6. Tetrapedia flavipennis. 



Female. Length 4 lines. — Yellow. The vertex black, with a narrow 

 yellow line before the anterior ocellus ; the tips of the mandibles 



