70 Psyche [June 



DESCEIPTIOXS OF 'NE\Y ICHXEUMOXIDJE IN THE 



COLLECTION" OP THE MUSEUM OF COMPAEATIVE 



ZOOLOGY, CAMBEIDGE, MASS. 



By Henry L. Viereck, 



Washington, I). C. 



"With one exception the following new species are all from locali- 

 ties in Virginia near the District of Columbia. 



Ameloctonus xanthocerus sp. nov. 



Type.— Xo. 11182, M. C. Z. 



Type-locality. — Great Falls, Virginia, June 5 (N. Banks). 



Female. — Length, 7 mm.; ovipositor 1.25 mm.; related to .4. 

 clisiocampce Weed, from which it is readily known by the color of 

 the antenna?, the less completely areolated propodeum, etc. Head 

 black, dullish, finely densely sculptured, sericeous with silvery pu- 

 bescence, temples and occiput between occipital carina and top 

 of head shining and less densely sculptured than the face, facial 

 line : transfacial line : : 25 : 34, axial line : temporal line : : 10 : 6, 

 greatest diameter of lateral ocelli apparently a trifle longer than 

 the ocellocular line, which latter is shorter than the lateral ocellar 

 line which in turn is shorter than the postocellar line which in turn 

 is distinctly shorter than the ocelloccipital line, clypeus truncate, 

 finely gra'uular and indistinctly punctured, mandibles mostly yellow, 

 with brownish teeth, palpi mostly pale, antennae mostly yellowish 

 stramineous, blackish or black beyond the 10th Joint, scape nearly 

 as thick as long, pedicel apparently less than half as long as scape, 

 joint 3 distinctly longer than -4 but shorter than -4+5 and at least 

 three times as long as thick at apex, following joints subequal, joint 

 27 apparently thicker than long; thorax colored, sculptured and 

 pubescent much like the head, mesonotum sculptured much like 

 the clypeus except where the notauli ought to be where the sculp- 

 ture is not so fine, pronotum reticulated, laterally striate, meso- 

 pleurse mostly densely reticulated and punctured, the upper halt 

 with a striate depressed area and an almost sculptureless streak, 

 scutel sculptured much like the clypeus, metanotum with indefinite 

 sculpture, metapleurro sculptured and pubescent much like the 



