MYZINE. 181 



pale yellow ; the terminal segment longitudinally striated, its apical 

 margin rufo-testaceous. 



Hab. Brazil, St. Paulo. 



10. Myzine albomaculata. 



Female. Length 6 lines. — Black, shining, and sparingly punctured. 

 Head with a few fine punctures, the cheeks and clypeus having a 

 little hoary pubescence. Two small subovate maculae on the pro- 

 thorax above, a similar one on its sides, a small transverse one on 

 the mesothorax at the margin of the scutellum, a small spot at the 

 basal margin of the metathorax in the middle, and a subovate one 

 at its posterior lateral angles, white ; the posterior tibiae with a 

 row of spines on their outer margin ; wings subhyaline, the ner- 

 vures black, the tegulae pale testaceous. Abdomen with a subovate 

 macula on the second and third segments laterally ; the apical seg- 

 ment densely covered with short brown pubescence ; its margin 

 pale testaceous or white. 



Male. Length 4 lines. — Black, shining, the head and thorax finely 

 punctured and variegated with yellow ; the segments of the abdo- 

 men not constricted. The clypeus, mandibles, and scape of the 

 antenna? in front, white ; the flagellum fulvous beneath towards the 

 base. Two subovate spots on the prothorax, a smaller one on the 

 mesothorax at the base of the scutellum, a spot on the latter, the 

 postscutellum, and a minute spot at the base and also at the apex of 

 the metathorax, yellowish white ; the tibia?, tarsi, and apex of the 

 four anterior legs, pale yellow ; the anterior and intermediate tibiae 

 behind, and the posterior pair at their apex, black ; the claw-joint 

 of the tarsi black or fuscous ; wings hyaline and iridescent. Abdo- 

 men smooth and shining. 



Hab. Para ; Tunantins and Ega on the Amazons. 



The sexes taken in coitu by Mr. H. W. Bates. 



11. Myzine iridipennis. 



Male. Length 5| lines. — Black, shining, and very finely punctured. 

 Head narrowed behind the eyes ; the anterior margin of the cly- 

 peus, and of the face to the eyes, and also the mandibles, white, 

 the last black at their apex ; antennae entirely black ; two minute 

 spots between the antennae, sometimes obsolete. A narrow inter- 

 rupted line on the anterior margin of the prothorax ; the meta- 

 thorax with white pubescence at the sides ; wings hyaline at the 

 base, nearly to the extremity of the externo-median cell, from there 

 fuscous with a brilliant violet iridescence. Abdomen with the 

 apical margins of the segments very narrowly- and indistinctly 

 rufo-testaceous. 



Hab. Amazons, Ega. 



