598 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii. 



dot on each trochanter, tarsi toward the apices brown (antenna? beyond 

 the third joint wanting in the single specimen under observation); 

 body polished; hairs of thorax yellow; wings hyaline, the broad apices 

 gra}', sixth vein extending beyond middle of lower fork of the fifth; 

 length, 3.5 mm. A male specimen, collected July 1^, by Mr. C. W. 

 Johnson. 



ILihitat. — Delaware Water Gap, New Jerse}^ 



Type.— C?it. No. 5450, U.S.N.M. 



LEPTOMORPHUS HYALINUS, new species. 



Yellow, an ocellar dot and the mesonotum, except the lateral mar- 

 gin, interrupted above insertion of wings, black; antennae, except the 

 two basal joints, brown; abdomen with indications of an irregular 

 brown fascia at apex of each segment; bod}" polished; wings hyaline, 

 densely short haired; length, 9 mm. Two female specimens, collected 

 by H. K. Morrison. 



llnhitat. — White Mountains, New Hampshire. 



Type.— C^t. No. 5451, U.S.N.M. 



ACNEMIA FLAVEOLA, new species. 



Yellow, the antennte and tarsi becoming brow^n toward their apices, 

 segments two to six of abdomen, each with a median brown fascia, 

 shortest on the second and third, a brown dot on underside of each 

 trochanter; bristles of tibia? much shorter than greatest diameter of 

 the tibia?; wings hyaline; length, 3 unu. A female specimen, collected 

 July 11, by Mr. C. W. Johnson. 



Ilahitat. — Delaware Water Gap, New Jersey. 



Type.— C^t. No. 5452, U.S.N.M. 



EXECHIA ANALIS, new species. 



Head black, the face, mouth parts, and base of antennte 3'ellow; 

 thorax black, slightl}" polished, a small, triangular, yellow spot below 

 the humeri; abdomen dark brown, the third and fourth segments, 

 except hind margin of the latter, yellow; legs yellow, the broad apices 

 of hind femora dark brown, tarsi brownish yellow, bristles of hind 

 tibicG noticeably longer than greatest diameter of the tibire; wings 

 hyaline, a brown fascia fills apex of marginal cell and crosses the first 

 posterior; length, 2 nun. A male specimen, collected July 8, by Mr. 

 C. W. Johnson. 



Ilahitat. — Delaware Water Gap, New Jersey. 



Type.— C2it. No. 5453, U.S.N.M. 



DYNATOSOMA THORACICA, new species. 



Head black, upper part of face, base of antennie, and the mouth 

 parts yellow; thorax and scutellum black, subopaque; abdomen dark 



