1865.] 277 



Var. a. — 9 . Head and thorax more deeply tinged with blue and 

 having a more or less violet reflection ; the legs, except coxae and tro- 

 chanters, rufous, the posterior tibiae and tarsi more or less dusky; in 

 one specimen the posterior tarsi has the third and fourth joints bright 

 yellow ; in two specimens the basal segmeut of the abdomen is entirely 

 blue-black ; the wings have a strong violaceous reflection. Same size. 



Three specimens. This may be a distinct species, in which case it 

 may be named E. rufipes. There is, however, no difference between 

 the two, except coloration, principally of the legs. 



5. Exetastes affinis, n. sp. 



Black: abdomen except extreme base, rufous ; wings fuliginous. 

 Female. — Closely resembles E. abdominalis, but is more robust, more 

 deeply punctured, the color of the head and thorax is deep black, with- 

 out any tinge of bluish, so conspicuous in the preceding species ; the 

 punctures of the thorax are very close and fine, but distinct; the meta- 

 thorax is finely and very densely rugose, opaque ; the legs are entirely 

 deep black, except the anterior pair in front where there is a tinge of 

 obscure testaceous ; the wings are uniform dark fuliginous, the anterior 

 pair with a strong violaceous reflection, while the posterior pair is iri- 

 descent ; the abdomen is short, much more robust, pale rufous, with 

 the basal half of the first segment and the extreme tip of the venter, 

 black. Length 6 lines; expanse of wings 10i lines. 



One specimen. 



6. Exetastes flavitarsis, n. sp. 



Black ; face, two spots in front of mesothorax, tegulse, four anterior legs and 

 posterior tarsi, yellow ; posterior femora and tibire, and the abdomen except 

 base, ferruginous; wings hyaline. 



Male. — Black, shining, minutely punctured, clothed with a very 

 short palish pubescence ; face, orbits, interrupted in front and behind, 

 clypeus, mandibles except tips, and the palpi, yellow ; antennas about 

 as long as the body, black or brown-black, the basal joint beneath yel- 

 low ; in one specimen there is an obscure pale annulus about the middle. 

 Thorax : line on each side of the collar, a spot or hooked line on each 

 side of the mesothorax in front, sometimes much reduced or entirely 

 wanting, the tegulae and a line beneath, yellowish ; scutellum at tip 

 and the postscutellum rufo-piceous ; in one specimen the scutellum has 

 an obscure yellowish stain. Wings hyaline, iridescent, sometimes very 

 faintly tinged with yellowish-fuscous ; nervures fuscous, yellowish at 

 base ; areolet shaped as usual, but scarcely subpetiolated. Legs slender, 

 the posterior pair v^ery long ; the two anterior pairs yellow, more or less 

 tinged with honey-yellow, their coxae black above and yellow beneath ; 



