1864.] 149 



24. Ich. extrematis. n. sp. 



Deep black: aunulus on antennse, seutellum and extreme apex of aodomen 

 above, white: wing.s subbyaline ; central area of metathorax moderate, sub- 

 quadrate. 



Female. — Deep black, somewhat shiniug, densely and finely punc- 

 tured ; clypeus on each side with a deep fovea ; antennsB about half 

 the length of the body, slightly involute, black, 8th to 13th joints above 

 white ; seutellum flat, polished, yellowish-white ; metathorax finely 

 punctured, the elevated lines well defined, the central area moderate, 

 subquadrate, slightly transverse. Wings subhyaline, tinged with fuli- 

 ginous ; nervures and stigma black, the latter with a pale spot at base ; 

 areolet 5-angular, somewhat oblique. Legs black, sericeous, the ante- 

 rior pair brownish in front, the posterior trochanters white. Abdomen 

 rather stout, .subovate, shining, the 2nd and 3rd segments opaque ; 

 basal segment rather broad, glossy, bilineated, obsolete ly aciculate ; 

 basal fovese of the 2nd segment subobsolete ; apical segments polished ; 

 terminal segment above and the posterior margin of the 6th segment, 

 white ; beneath black ; ovipositor not exserted. Length 5 lines ; ex- 

 panse of wings 8 lines. 



Ilab. — Illinois. Dr. Samuel Lewis. 



Closely allied to Ich. hrevicmctor Say. but is shorter and more ro- 

 bust, and the wings are shorter and darker ; it is readily distinguished 

 from Say's species by the posterior trochanters being entirely white. 



Ich. hrevicinctor Say also belongs to this Section. 



Section 3 — h. 



25. Ich. cseruleus, n. sp. 



Deej3 blue, shining; thorax tinged with green; orbits, two spots on clypeus, 

 lateral sutures of mesothorax, two short lines on its disk and sides of seu- 

 tellum, whitish ; wings clear ; central area of metathorax moderate, quadrate, 

 indistinctly defined. 



Female. — Deep dark blue, shining, clothed with a very short pale 

 pubescence ; head black with a bluish-green tinge, closely punctured ; 

 the orbits (interrupted behind), a round spot on each side of the cly- 

 peus, the labrum, a spot on the mandibles and the palpi, whitish ; labrum 

 and mandibles fringed with yellowish pubescence ; antennae short, in- 

 volute, black, the 10th to 15th joints above white, the tip beneath fus- 

 cous. Thorax rather closely and finely punctured ; the mesothorax 

 black more or less tinged with green, the pleura and metathorax green- 



