]92 AMERICAN HYMENOPTERA. 



beneath, but the edge of the keel uniformily curved, the hind 

 tibiae somewhat swollen, and the second and third joints of the 

 hind tarsi produced at the side. The middle tibise of saundersi 

 are simple. 



(18.) Diadasiafriesei u.sp. J . — Length 11 mm., black with paleochraceous 

 pubescence. Head ordinary ; facial quadrangle about as broad as long; sides and 

 middle of face, labruni, occiput and cheeks pubescent; clypeus bare and shining' 

 with distinct but sparse punctures, some large and some small ; front above 

 antennse densely punctured, the punctures tending to run into grooves; area just 

 before the ocelli and vertex shining and very sparsely and feebly punctured ; 

 fiagelluni feri'uginous beneath; mandibles rufescent in middle: maxillary palpi 

 6-jointed, third and fourth with long hairs, fourth longer than fifth and sixth to- 

 gether ; thorax with short, tolerably abundant ocliraceous pubescence : mesothorax 

 shining, with small, not very close punctures ; scutellum with distinct sparse punc- 

 tures; base of metathorax minutely granular; tegulse reddish testaceous; wings 

 dusky hyaline ; nervures brown ; second submarginal cell rather small, hardly nar- 

 rowed above, receiving the recurrent nervure a little beyond its middle; third 

 submarginal much larger than first ; legs black, with ochreous pubescence, that on 

 hind tibige long and conspicuously plumose ; long hairs on inner side of basal 

 joint of hind tarsi becoming a sort of purplish brown ; abdomen dullish and 

 hardly or not punctured, with short sparse pubescence, pale on the first segment, 

 mostly fuscous or black on the others; hind margins of the first to fourth segments 

 with ochreous hair-bands, well defined and conspicuous, except on the first; 

 apex with dense ochreous pubescence, more or less tinged with fulvous. 



Hab. — Southern California, two sent by Mr. Fox. Named after 

 Mr. H. Friese, of Innsbruck. D. friesei is allied to D. riiiconis, hut 

 the tegulse are quite differently colored, the second submarginal cell 

 is conspicuously smaller, and the two abdominal bands are narrow, 

 with their upper outline ill defined. It differs from D apacha by 

 the color of the abdominal pubescence ; from D. tobica in the meso- 

 thorax and the shape of the second submarginal cell ; from D. 

 albovedita by the pubescence, and from D. triciada by the abdomi- 

 nal pubescence, especially the absence of black hair on the sixth 

 segment. 



(19.) Diadasia megamorpha n. sp. %. Length about 16 mm.; black, 

 with dull white pupescence not hiding the surface. Head somewhat broader 

 than long; facial quadrangle longer than broad; ocelli in a line; face to .some 

 distance above the antennae ; labrum, lower and hind part of cheeks with abund- 

 ant pubescence; vertex and upper part of cheeks bare, shining, with some 

 scattered punctures,— even these wanting on sides of vertex ; clypeus punc- 

 tured; mandibles black, with two orange stripes near the tip; maxillary palpi 

 6-jointed. fourth longer than fifth and sixth together; antennae black, reaching 

 to hind part of tegulse ; thorax with abundant erect white pubestrence, except the 

 mesothorax, which is bare, shining, with numerous shallow but distinct punc- 

 tures and a very few scattered hairs; at the place of each parapsidal groove is a 



