204 AMERICAN HYMENOPTERA. 



IVyssoii clarconis u. sp. 



Related to albomargmatus, mellipes and pxiinilis. 



% . — 7 mm. — Head. — Distinctly punctured, the ocelli forming an equilateral 

 triangle about an elevation of the vertex. The distance between the ocelli equal 

 to or a little less than the distance between the posterior ocelli and the nearest 

 eye margin. Third antennal joint as long as the second and a little shorter than 

 the third, beyond which latter the joints are subequal. The clypeus is, along its 

 anterior margin in the middle, produced into a short punctate process. The dor- 

 sulum has adjoining shallow punctures giving it an almost reticulated appear- 

 ance. The mesopleura are sculptured in much the same way. The metathorax 

 has an enclosure that is bounded on each side laterally by an area densely clothed 

 by appressed silvery pubescence. In the median area there is a series of longitu- 

 dinal grooves that do not extend as such to the apex. Laterally the metathorax 

 at the middle of the junction of the posterior aspect and the pleura is prolonged 

 into a spine which is directed backward, outward and upward. The abdomen 

 has distinct separated punctures, which on the apical segments are almost conflu- 

 ent. The posterior tibise and apex are wider than the posterior femora. The 

 projections on the apical abdominal segment are a little shorter than the space 

 between them is wide. The color is black. The legs, excepting the tarsi and the 

 coxae and trochanters, which are blackish, the first abdominal segment, excepting 

 the apical yellow margin, reddish. The scape, excepting the yellow spot, the 

 mandibles, excepting the blackish margins and the basal .sutures of the second 

 dorso-abdominal segment laterally, and the second, third and fourth ventral ab- 

 dominal segments basally all brownish. 



The posterior margin of tho pronotum, the tubercles and the scutellum, apical 

 margin of the first and second dorso-abdominal segments, and a short apical band 

 on each side of the dorso-abdominal segments 3, 4 and 5 yellow. 



The black of the insect, as well as the reddish, is more or less covered by a 

 sericeous pubescence which is silvery, excepting on the dorsulum, where it is 

 golden. 



Type. — University of Kansas. 



Type locality. — Clark Co., Kansas, 1962 ft. 



One male taken in June by F. H. Snow. 



Didineis craKsicoriiis u. sp. 



Related to texanus, but is a more robust species with thicker au- 

 tennse. 



% . — 6 mm. — Front with fine adjoining punctures. The punctures on the 

 vertex equally fine but distinctly separated. The third antennal joint a little 

 shorter than the fourth. The succeeding joints subequal and none of them espe- 

 cially thickened but cylindrical. The apical joint of the antennae, as in peculiaris. 

 The wings are distinctly brownish, with the color intensified with a streak 

 through the wings traversing the marginal, second submarginal and third discoi- 

 dal cells. The second recurrent nervure is inserted further from the insertion 

 of the second transverse cubitus than the first recurrent nervure is inserted from 

 the second transverse cubitus. The uervures are very dark brown, as is the 

 stigma, but the costal nervure of the posterior rings is pale brown. The dorsu- 



