NORTH AMERICAN HYMKNOPTERA. 249 



SphHTOplitlialiiia bisiguata Blake. 



Female.— Kead subquadrate, wider than the thorax, posterior angles not 

 niunded. vertex and face clothed with pale golden pubescence, posterior margin 

 black, cheeks prominent, clothed with silvery hairs ; anteunie black : 

 eyes round, polished ; thorax short, suddenly narrowed behind, clothed 

 with pale golden i)ubescence, mesothorax with triangular, granulate, 

 black patch, metathorax abruptly truncate ; legs rufo-piceous. clothed 

 with pale glittering hairs; abdomen ovate, basal segment black, second 

 segment with a large subquadrate black patch on the disc, surrounded 

 by an eraarginate band of golden pubescence, enclosing two small 

 lateral black spots ; apical margin clothed with dense black pubescence, 

 remaining segments fringed with silvery pubescence ; ventral seg- 

 ments thinly clothed with long pale hairs. Length 11 mm. 



Hab.— Mexico. Prof. F. Sumiclirast. 



Sphieroplithalnia couueotens Cresson. 



i^fm«?('.-- Ferruginous or fusco-fernigiuous, closely and rather finely punctured : 

 head large, quadrate, wider than the thorax, clothed with a short, dense, golden 

 sericeous pubescence; eyes small, round, entire and convex; apical half of man- 

 dibles black ; antenuffi ferruginous, dusky towards the apex ; thorax short, sub- 

 (luadrate, broad and slightly rounded in front, somewhat strangulated about the 

 middle and abrupt and truncate behind, the lateral margins serrate ; upper sur- 

 face blackish, with fu.scous pubescence ; a patch on each side of the metathorax 

 above, as well as most of its posterior face, with a short golden sericeous pubes- 

 cence ; the lateral excavation veiy lai-ge. rather deep, smooth and polished; legs 

 ferruginous, with yellowish pubescence ; abdomen ovate, broad at base, rather 

 densely clothed with short, appressed, golden sericeous pubescence, paler on the 

 apical segments; on the basal middle of the second segment above a large 

 rounded, fuscous spot extending a short distance on the apical margin of the 

 first segment, and on the apical middle of the second segment another large dark 

 fuscous spot, rather transverse, and connected with the basal spot by a short, nar- 

 row, fuscous line down the middle of the segment ; both spots are clothed with 

 fuscous pubescence, that on the apical spot darkest ; apical segments above and 

 beneath densely clothed with golden sericeous pubescence. Length 9-11 mm. 

 (Cresson.) 



Hab. — Cape St. Lucas, Lower California. 



Spltieroplitlialnia ferrnginea Smith. 



Fe»irt/c. — Ferruginous, rugose: the head wider than the thorax, subquadrate. 

 the hinder angles acute, the posterior margin nearly straight, densely covered 

 above with pale golden colored pubescence, that on the cheeks is thin and silvery 

 white; thorax oblong, pyriform, with a thin, short, pale golden pubescence, and, 

 as well as the head, thinly sprinkled with erect pale hairs ; the legs with thin 

 pale pubescence; the intermediate and posterior tibia? with black spines; the 

 first segment of the abdomen small and with a sxiot of silvery white pubescence: 

 the second segment with a subovate patch of black pubescence in the middle 

 towards the basal margin, its apical margin with black pubescence; the third, 

 fourth and fifth .segments with silvery white pubescence in the middle, that at 

 the side of the apical .segment being black ; beneath the segments are fringed 

 with white. Length 13 mm. (Smith.) 



Hab. — Mexico, Orizaba. 



TRANS. AMER. ENT. SOC. XIII. (32) SEPTEMBER. 1886. 



