358 FAUNA HAWAIIENSIS 



punctured than the rest ; the superior median areola small, distinct, semicircular, 

 broader than long ; posterior median triangular at base ; from that it contracts slightly, 

 and ends above the middle of the metanotum, where there is another field longer and 

 somewhat oval in form, which occupies the rest of the middle space ; the posterior inter- 

 median area is semiobsolete, small ; spiracular, large, wider at base than at apex ; at the 

 base it becomes rounded and enlarged. Wings hyaline ; areolet shortly stalked ; stigma 

 fuscous. (Cameron.) 



Hab. Hawaii : Mauna Kea, at an elevation of at least 13,000 feet, on the snow 

 near the summit. 



Family LXXVIl. ALYSIIDAE. 



Subfamily II. ALYSIINAE. 



Tribe II. ALLOEINI. 

 Aphaereta Forster. 

 1862. Aphaereta Forster, Verh. d. naturh. Ver. Rheinl., xix. p. 264. 



(i) Aphaereta muscae Ashmead. 



1888. Aphaereta muscae Ashmead, Proc. U. S. Nat. Mus., x. p. 646. ?, ^. 

 1898. Dalla Torre, Cat. Hym., iv. p. 42. 



$, t- Length 2 to 2-5 mm. Polished black ; first two joints of antennae, the 

 mandibles, the prothorax, the legs and the first segment of the abdomen, honey-yellow 

 or reddish-yellow. 



The antennae in the % vary from 21 to 23-jointed, in the Z from 24 to 26 joints, 

 the first and third joints of the flagellum being subequal, shorter than the first. The 

 mesonotum is without a fovea just before the scutellum, the scutellum being deeply 

 foveated at base and divided by a delicate median carina into two parts, the bottom 

 usually showing a few striae ; the postscutellum is carinate ; the metathorax posteriorly 

 is strongly wrinkled, while the upper basal part of the metanotum is short, smooth, with 

 two areas, the median or dividing carina being strongly developed and elevated 

 posteriorly, the furrow on the mesopleura being crenate. The wings are hyaline, ciliate, 

 with the costae and the narrow stigma brown, the internal veins much paler or 

 yellowish-white ; the first abscissa of the radius is about as long as the second transverse 

 cubitus, rarely a little longer, while the latter is about half the length of the first trans- 

 verse cubitus, or a little shorter. 



