TEXRA.LOWIA. Ill 



TETRALONIA, Spin. 



1. Tetralonia reversa. 



Female. Length 6 lines. — Black, the abdomen shining, the apical 

 and ventral segments pale ferruginous. The head shining, the cly- 

 peus punctured and with short glittering white hairs ; the labrum 

 with pale pubescence. The thorax, as well as the anterior and 

 intermediate legs, with black pubescence ; the posterior legs with 

 bright fulvous pubescence ; the apical segments of the abdomen 

 with fulvous pubescence ; wings subhyaline, the nervures black. 



Hab. Brazil, Tejuca. 



2. Tetralonia fiagellicornis. 



Male. Length 4| lines. — Black, the thorax with fulvous pubescence 

 above ; antennas longer than the body, the joints subarcuate. The 

 anterior margin of the clypeus broadly yellow, also a yellow spot 

 at the base of the mandibles ; a little thin pale pubescence on the 

 face, that on the cheeks white. The pubescence on the thorax 

 beneath and on the legs white ; the two apical joints of the tarsi 

 ferruginous ; wings hyaline and iridescent, faintly clouded at their 

 apex, the nervures black. Abdomen with a little pale fulvous 

 pubescence at the base, and a narrow white pubescent fascia on the 

 apical margins of the second to fourth segments, that on the two 

 apical ones dark fuscous. 



Hab. Mexico, Oajaca. 



3. Tetralonia gyrosa. 



Male. Length 6 lines. — Black, with the four apical joints of the 

 tarsi ferruginous ; the clypeus and labrum yellow, the former with 

 the base black, the black portion with a yellow notch in the middle ; 

 the mandibles reddish yellow at their apex. The face with a little 

 pale pubescence, that on the vertex fuscous, on the cheeks and 

 thorax beneath it is white ; the pubescence on the thorax above is 

 a mixture of pale yellowish brown and dark fuscous ; the wings 

 navo-hy aline, the nervures pale ferruginous. Abdomen shining, 

 with pale yellowish-brown pubescence at the base ; at the base of 

 the second segment laterally a little patch of pale tomentum ; the 

 third, fourth, and fifth segments with a narrow fascia of thin, short, 

 white pubescence a little before their apical margin ; the segments 

 beneath fringed with white pubescence. 



Hab. Ega, on the Amazons. 



