20 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol. 63. 



The original description follows: 



$ . — Length 1.2-1.5 mm. Rufo-piceous, legs yellowish. Head broad, darker than 

 the thorax, microscopically punctate or shagreen; lateral ocelli as far from the eyes 

 as from the central one; antennae yellow, the club dusky, the pedicel as long as the 

 first two joints of flagellum, club joints subquadrate. Thorax and abdomen rufo- 

 piceous, petiole paler; metathorax and petiole pubescent. 



(? . — Closely resemble 9 in size and coloration. Antennae paler; pedicel small, 

 first joint of flagellum minute, closely joined to the swollen second joint, the two 

 together almost egg-shaped, first joint of club small, subtriangular, the following 

 joints quadrate, subpedicellate, terminal joint larger, acuminate. 



Described from several female and male specimens obtained near Hull in August. 



2. ERITRISSOMERUS CECIDOMYIAE Ashmead. 



Eritrissomerus cecidomyiae Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 299, pi. 

 13, fig. 1. females.— Brues, Bull. 22, Conn. Geol. Nat. Hist. Survey, 1916 

 (1917), p. 534. 



Female. — Length 2 mm. Head slightly over twice as wide as long, 

 flattened in front and behind, a little wider than the thorax; occiput 

 roughened, with many longitudinal wavy carinae j cheeks subconvex, 

 rugose; very strongly shagreened; vertex rugose, with many irregular 

 transversely directed carinae; middle of frons with a longitudinal 

 furrow, into which converge numerous large, curving striae ; intero- 

 cellar area present as a line, carinate, the anterior ocellus intercept- 

 ing a line connecting the lateral ocelli; lower part of face with straight 

 transverse carinae; malar space polished, unsculptured ; antennae 

 rather stout; pedicel twice as long as wide, as wide as joint four and 

 as long as joints three and four united; three longer than wide, nar- 

 rower than four and closely jointed to it, about as long as four; five 

 and six a little longer than wide, shorter than four; five narrower 

 than four or six which are equally wide; seven to nine broadly trans- 

 verse, shorter and wider than six; ten as long as four, blunted api- 

 cally, as wide as nine; thorax three-fourths as wide as long, egg-shaped, 

 strongly convex above, a little higher than wide, strongly shagreened 

 except on the pleural and sternal plates; notauli complete; median 

 lobe pointed posteriorly; scutuUum transverse, convex, strongly sha- 

 greened, margined laterally, without pubescence; abdomen broadly 

 elliptical, sharply pointed apically, as wide as the thorax, two-thirds 

 as wide as long; first tergite short and wide, the median area wider 

 than long, well defined laterally; second tergite a little longer than 

 wide, twice as wide apically as basally, strongly and regularly striate 

 on basal half, the foveae sparsely pubescent; tergites three to six 

 unsculptured, united one-third as long as the second; six triangular, 

 broadly transverse, sharply pointed apically; wings hyaline, extend- 

 ing slightly beyond the apex of the abdomen. Black; joints three 

 to five of antenna, most of anterior femora, anterior tibiae, other 

 tibiae basally and all tarsi, of the color of gold; rest of appendages 

 shining black or infuscated. 



