80 CHARLES ROBERTSON. 



% . — Resembles the female, but is a little more coarsely punctured, base of 

 inetathorax with radiating striae on the sides, extreme sides of abdomen with 

 rather long spines. Two spots on prothorax, anterior and middle femora more 

 yellow at tips, anterior and middle tibia:' more yellow exteriorly ; abdomen 8-10 

 spotted. Length J, 8-9 mm.; 'J, , 6-8 mm. 



Pennsylvania, Illinois, Montana, Colorado. Three males, two 

 females (coll. Am. Ent. Soc). 



4. Osybelus coriiutiis n. sp. 



% . — Head and thorax densely and very coarsely punctured. Clypeal process 

 prominent ; posterior ocelli each placed on the upper and outer side of a tubercle 

 which is prominent, smooth and shining; these ocelli, therefore, do not face in 

 the usual direction, but look upwards and outwards. On the vertex behind the 

 posterior ocelli and midway between them is a third tubercle, which is smooth 

 aud shining. Prothorax carinate, angulated on the sides, impunctate; soutellum 

 and postscutellum with a median longitudinal carina, whicli is more prominent 

 on the latter. Spine long, not deeply channeled, slightly widening towards the 

 rounded tip. Base of metathorax with radiating strife; below the spine there 

 is a small triangular fossa, which is smooth aud shining; lateral faces punctured, 

 with parallel strise running from a strong median carina. Abdomen with stout 

 lateral spines, deeply constricted between the segments, very coarsely punctured ; 

 truncation concave ; basal segment narrovvly and deeply depressed medially, 

 giving the abdomen a cordate appearance. Black ; face with white pubescence. 

 Two spots on prothorax, tubercles, inner border of squama whitish. Middle of 

 mandibles rufous; flagellum reddish towards tip beneath. Tegulje and base of 

 wing honey-yellow ; squama whitish hyaline. Abdomen with ten spots on the 

 sides whitish. Legs black, anterior and middle femora at tips beneath, line on 

 tibife exteriorly whitish, tarsi piceous. Wings hyaline, nervures dull ferruginous. 

 Length 7.5-9 mm. 



Montana. Two male specimens (coll. Am. Enf Soc). 

 One specimen has the mesothorax rufons in front, more extensive 

 on the sides over the tegulae. 



5. Oxybelus Packarclii n. sp. 



0. Ixtus Pack, {nee Say), Proc. Ent. Soc. Phil, vi, 434. 

 9 . —Smooth and shining. Head and thorax rather closely and coarsely punc- 

 tured. Clypeal process prominent; prothorax carinate; scutellum and post- 

 scutellum with a median longitudinal carina, more prominent on latter. Spine 

 channeled above, rounded or truncate at tip ; base of metathorax with few large 

 reticulations Median space on posterior plate terminating below in an oval de- 

 pression, which is smooth and shining; lateral faces finely roughened. Abdo- 

 men smooth and shining, rather closely and finely punctured, slightly depressed 

 at base medially, segments somewhat depressed on apical margins. Black, clothed 

 with white pubescence, which is dense and silvery on face, more yellowish on 

 mesothorax. Interrupted band on prothorax, tubercles, two spots on scutellum, 

 inner borders of squampe and posterior border of postscutellum sometimes more 

 or less, whitish. Mandibles, except tips, honey-yellow ; flagellum and scape at 

 base and apex fulvous. Wing scales testaceous, squama whitish hyaline. Ab- 



