AMERICAN HYMENOPTERA. 223 



the tibijB white ; a spot on tips of femora above, and a line down all 

 the tibife black, apex of posterior tibiae and all the tarsi blackish, api- 

 cal joint white; wings hyaline, faintly clouded ; stigma and nervures 

 black. 



% . — The male has the tergum black; with an obsolete rufous stripe 

 down the middle ; only the base of venter rufous and less of black upon 

 the legs. 



Angang, Mexico. (H. de. Saussure). 2 9 , 4 S . 



20. Strongylogaster lineatus, n. sp. 



Black; mouth, tegulse, most of anterior angle, a line on pleura and most of 

 venter reddish-yellow. Length 0.26. Br. wings 0.54 inch. 



% 9- — Black; body slender; antennfe slendei", somewhat enlarged 

 on middle; nasus and mouth below white; tegulae, most of anterior 

 angle, a longitudinal stripe on pleura, and a large spot on venter, cov- 

 ering four or five basal segments, reddish-yellow; legs the same color; 

 a spot on tip of femora and a line down the four hinder tibiiie blackish ; 

 tarsi black ; wings hyaline, stigma black. 



Angang, Mexico. (H. de. Saussure.) 1 9 , 3 S . 



In the male the outer discoidal and apical cells are closed. 



21. Strongylogaster nigricans, n. sp. 



Black; mouth, collar, and bands on legs white. Length 0.24 — .32. Br. wings 

 0.54.— 64 inch. 



9 S . — Shining black ; body slender ; antennae slender, not longer 

 than thorax, third joint longer than fourth; nasus slightly incurved, 

 and with the mouth beneath white; the edges somewhat blackish ; tegu- 

 lae and collar white ; remainder of body black ; legs mostly white ; 

 two-thirds of coxae, a line down the anterior legs above, a band on the 

 medial femora, interrupted before, a wide band on posterior femora, 

 apex of four posterior tibiae, and the posterior tarsi black, the base of 

 first joint white ; wings faintly clouded, stigma and costa black. 



Cuantla, tierra fav., Mexico. (H. de. Saussure.) 3 9,3^. 



22. Strongylogaster nigredo, n. sp. 



Black; legs white before; wings obscure. Length 0.28. Br. wings 0.5S inch. 



%. — Shining black; body slender; antennae moderate, formed as 

 in 3Iacropliya and Selandria, enlarged in middle ; mouth black, palpi 

 pale; legs black, coxae and trochanters black, anterior legs whitish be- 

 fore, a white band on the four posterior tibiae, interrupted by a slender 

 black line above ; wings obscure blackish, stigma and nervures black. 



Var. — Hinder tibiae almost entirely dark. 



Toluca, (H. de. Saussure.) Mex., (3 S . 



