156 
BulJrt'in Wisicous'ni yatural Histonj Societi/. [Vol. 5, No. 3. 
3. Abdomen smooth and polished except at the sutures. 
pacificum Ashm. 
Abdomen longitudinally rugose or striate 4 
4. Metanotum rui>-ulose medially, without a central carina 5 
Metanotum with a distinct carina medially at the base ; scapulae 
punctate graenicheri Brues, 
5. Frontal ledge broad, on the same plane as the vertex, scapulae 
impunctate pilosum Ashm. 
Frontal ledge not so broad and not on the same plane as the 
vertex, more oblique nigrum Ashm. 
Hadronotus robustus ^^p. nov. 
Female. Length 1.7 mm. Entirely black; the tibiae and tarsi dull 
rufous. Head larg-e, considerably wider than the thorax, and three 
times as wide as thick, the occiput arcuately excavated ; its surface 
coarsely rugose. Occiput above with a finely raised line, vertex with- 
out any smooth areas ; lateral ocelli about their own diameter from 
the eye margin. Eyes bare. Facial excavation above the antennse 
deep, transversely striated and margined by a raised line laterally. 
Antenne 12-jointed, clavate, black, with the tip of the pedicel rufous. 
Pedicel and first fiagellar joint of equal length, second distinctly 
shorter, third small, quadrate, club fusiform, not very stout, the 
joints slightly transverse. Mesothorax and scutellum coarsely rugose; 
no parapsidal furrows. ^Vletathorax very short. Abdomen short, sub- 
globose, about as wide and as long as the thorax; first segment 
deeply grooved and ribbed longitudinally near its base, apically rugu- 
lose. Second segment twice as long as the first, and one-third as long 
as wide, rugulose basally and microscopically so near the apex; 
third segment less than one-half as long as the second ; fourth still 
shorter, both sculptured like the apical half of the second. Venter 
finely punctulate. Pleurne rugose but still more or less shining. 
Legs black, knees, tibirF and tarsi, except terminal joint, rufous. 
Wings hj-aline, the venation yellowish brown. Marginal vein short, 
about one-half the length of the stigmal ; postmarginal nearly twice 
the length of the stigmal. 
Described from one female specimen collected by the writer 
at Austin, Texas. 
The species is related to H. insiilaris Ashm. from Grenada, 
West Indies, and to H. rugiceps Ashm. from the United States. 
It differs from both in the relative lengths of the antennal joints 
and the segments of the abdomen. 
