682 FAUNA HAWAIIENSIS 



the mesosternum and mesopleura, excepting a spot beneath the tegulae, and the 

 scutellum, pale yellow. Thorax above for the most part blackish, the margins of the 

 mesonotum, a sjsot on the disc, one on the postscutellum and at the anterior margin of 

 the propodeum, as well as a band on the sides of the latter, all pale in colour, red, 

 testaceous or yellow, but never bright yellow like the head. Abdomen beyond the 

 second segment brownish, with black bands. Middle and front legs brownish yellow, 

 hind legs pitchy brown, the coxae yellow, marked with black, the trochanters also more 

 or less pale. Wings very iridescent, neuration blackish. 



Female with head markings as in the ^, but the pale colour, is more testaceous and 

 the sides of the head behind the eyes largely blackish. Prothorax reddish, mesonotum 

 red with a median anterior and two lateral dark areas, mesosternum black, the pleura 

 dark, but partly reddish, especially posteriorly, scutellum and propodeum red, the 

 former paler ; legs much as in the male, the hind pair generally darker than the others, 

 the coxae brownish. Basal joints of antennae more or less pale, especially beneath. 

 Basal two segments of abdomen black or nearly so, the rest obscure brown. 



Head above the antennae finely and densely punctate or coriaceous ; thorax also 

 very finely and densely so ; propodeum closely irregularly rugose, with short and rather 

 dense, pale pubescence. Antennae of female with about 24 joints, of ^ 25 or 26 joints. 

 Length 6 mm. 



Hab. Oahu ; not rare at about 1500 ft. in the mountains. 



(2) Atrometrjts sociabilis, sp. nov. 



Black, the whole face below the antennae, the scape of the antennae beneath, the 

 orbits for a short distance above the yellow of the face, the tegulae, the anterior and 

 intermediate coxae and trochanters, sulphur yellow or pale yellow. The pronotum is 

 reddish or yellowish in the middle above, more or less blackish or infuscate at the sides, 

 where the posterior and inferior angles are both paler, being either yellow or testaceous. 

 Mesonotum and propodeum entirely black. Front legs, except the still paler coxae and 

 trochanters, clear testaceous, the hind coxae black, yellow at the tips, the femora pitchy, 

 the tibiae and tarsi sordid, brownish yellow. Abdomen black, or in part brownish- 

 tinged, third and following segments ventrally yellowish brown. Neuration dark brown 

 or blackish. Antennae with the small ring joint 22- or 23-jointed in either sex. Head 

 above the antennae very densely and evenly punctate, propodeum densely irregularly 

 rugose, and pubescent, mesonotum excessively finely and closely punctured. Length 

 5 mm. Apparently allied to A. flavifrons Ashm. 



Hab. Hawaii ; Kilauea. 



