AMERICAN HYMENOPTERA. 13 



Selandria irrogata. — 9- — Shining black; antennae short, subfiliform, 



subrobust, third joint longer than fourth ; upper margin of prothorax laterally, 

 tegulae more or less, knees, anterior tibiae above, and base more or less of two 

 posterior pairs, white; wings faintly srnoky, iridescent, nervures and stigma 

 black, lanceolate cell petiolate, under wing with one middle cell. Length 

 .25 inch. 



Hah. — Colorado, (Morrison). 



Selaudria nevadensis. — 9- — Robust, shining black; labrum dull 

 white; antennae rather long, slender, third and fourth joints equal in length ; 

 pro- and mesothorax, scutellum except middle and tips, tegulee and upper 

 margin of pleura, fulvo-ferruginous; wings pale fuliginous, nervures and stigma 

 black, lanceolate cell petiolate, under wing with one middle cell ; tips of femora, 

 tibise except tips and base of tarsi more or less, white. Length .30 inch. 



%. — Like the 9, except that the middle lobe of mesothorax is sometimes 

 more or less black and the pleura is entirely so. Length .25 inch. 



Ilab. — Nevada, (Morrison). This and the next species are allied 

 to rudis Norton. 



Selandria montifaga. — 9- — Shining black; labrum dull whitish; 

 antennae about as long as head and thorax, slender, third and fourth joints 

 equal in length ; pro- and mesothorax, scutellum except tip, tegulse, and pleura 

 except two more or less confluent spots beneath, fulvo-ferruginous; wings 

 pale fuliginous, nervures and stigma black, lanceolate cell petiolate, under 

 wing with one middle cell; knees and anterior tibiae obscurely pale. Length 

 .25 inch. 



Hah. — Nevada, (Morrison). Closely allied to nevadensis, but dis- 

 tinguished by the shorter antennae and blackish legs. 



Selandria Rileyi. — 9-— Short, robust, head and thorax black; orbits, 

 confluent with an interrupted line across vertex behind ocelli, insertion of 

 antennae, spot between them, tip of first joint, elypeus, spot on mandibles, 

 palpi, most of prothorax, lateral margins of anterior lobe of mesothorax, a. 

 cordate spot on scutellum, a line on each side, tegulae, posterior margin of 

 pleura, legs, and most of abdomen, pale luteous: antennae rather slender, not 

 as long as head and thorax, third joint much longer than fourth ; wings hyaline, 

 iridescent, nervures and stigma luteous, lanceolate cell petiolate, under wing 

 with one middle cell; femora more or less dusky at base beneath; abdomen 

 short, broad, basal plates except apical margin and base of first segment black. 

 Length .25 inch. 



^a6.— Missouri, (C. V. Riley). 



Selandria parca. — %. — Small, robust, black: mouth piceous;' antennae 

 shorter than head and thorax, robust, third joint thickened, much longer than 

 the fourth; tegulae and spot before pale; wings hyaline, iridescent, nervures 

 and stigma fuscous, lanceolate cell petiolate, under wing with one middle cell; 

 tips of femora, tibiae and base of tarsi white; abdomen short, about as long as 

 head and thorax, shining black. Length .18 inch. 

 if(i6.— Texas, (Belfrage). 



