18 AMERICAN HYMKNOPTERA. 



more or less yellowish ; abdomen entirely black ; petiole tolerably slender, shorter 

 than hind femur, above sulcate laterally, sides not distinctly sulcate ; nervures 

 black, second submarginal narrowed more than oue-half above. Length 3 8.5 ram. 



Southern Florida (Robertson). Another example without locality. 

 6. Group tibialis. 



Pygidium ( 9 ) broad, not depressed. Petiole of abdomen rounded 

 pipe-like, not sulcate in the species so far known. The recurrent 

 veins received respectively by the second and third submarginal 

 cells. Cubital vein of hind wings interstitial. Ocelli almo.st forming 

 a curved line, so — , * . Legs rather robust, tibiiB spinose. Eyes 

 strongly diverging above. 



28. Pseii iibia lis Cress. 



Mimesa tibialis Cresson, Tr. Am. Ent. Soc. iv. 488, 9 % , 1872. 

 9. — Head distinctly punctured, but not strongly; fore margin of clypeus 

 broadly subtruncate, rather more rounded; face and clypeus densely silvery ; 

 ocelli situated in depressions, the space between hind pair much greater than that 

 between them and eyes; flagellum clavate. the length of the antennse is hardly 

 as long as head and that part of thorax anterior to postscutellum ; dorsulum cov- 

 ered with deep, separated punctures, those of scutellum running into rugse poste- 

 riorly ; mesopleurse rugoso-punctate, but not coarsely ; enclosure of median seg- 

 ment sulcate medially, with somewhat irregular rugae, remainder of middle 

 segment with a rather even, not coarse, rugoso-reticulation, except sides at base 

 which are finely striated ; posterior surface sulcate down middle; tegulae, tuber- 

 cles, tips of femora, base of hind tibife, the others entirely, the tarsi, pale yellow- 

 ish ; abdomen black, with a metallic-blue reflection, the apical margins of the 

 segments broadly testaceous ; petiole rounded, not sulcate. in length about twor 

 thirds as long as hind femur. Length 7 mm. 



Texas ; District of Columbia. I have not seen the male of this 

 species, which, according to Cresson's description, does not seem to 

 diifer much from the female, except that the abdomen is slender, 

 which in itself is not a reliable character. 



29. Pseii siifl'usus n. sp. 



O. — Head distinctly punctured, but not strongly; fore margin of clypeus 

 broadly subtruncate, more truncate than rounded ; face and clypeus densely sil- 

 very : mesopleurse with the punctures large and sparse,; riated posteriorly; en- 

 closui'e of middle segment smaller than in tibialis, with irregular rugae, not sulcate 

 medially; remainder of middle segment rugoso-reticulate, but not coarsely, ex- 

 cept sides at base, which are apparently smooth ; tegulae, tubercles, tips of four 

 anteiior femora, four anterior tibia} entirely, base of hind pair and hind tarsi 

 entirely, or ringed with, whitish ; flagellum beneath whitish or reddish ; abdomen 

 either with greater portion black, or tiiis is reversed and reddish prevails; this 

 color may be restricted to the second and third segments, or the abdomen may be 

 much sufl'used with it; petiole rounded, not sulcate. in length about two-thirds 

 as long as hind femur. Length 6-7 mm. 



New Mexico: Las Cruces, August 14, and Rincon (Cockerell). 

 Five specimens. 



