68 [January 



gined in front by a beautifully striated semicircle ; metathorax black, 

 uneven, transversely and irregularly striated ; tegulae yellowish-white. 

 Wings ample, hyaline, beautifully iridescent, slightly pubescent • ner- 

 vures and stigma pale fuscous, the latter large ; the cells shaped much 

 as in M. marginiventris, except that the discoidal cell is smaller in pro- 

 portion to the size of the other cells. Legs, including the coxae, yel- 

 lowish ; extreme tips of the tarsi, tips of the posterior femora, their 

 tibiae and tarsi, fuscous. Abdomen depressed, slightly sculptured at 

 base ; the first, part of the second and the apical segments, black, the 

 rest yellowish ; ovipositor nearly as long as the abdomen, blackish. 

 Length I} line; expanse of wings 34 lines. 



Collection. — Ent. Soc. Philad. One specimen taken on the Isle of 

 Pines. 



Microgaster hyalinus, n. sp. 



Dull black; palpi, tegulse, tibiae and tarsi, pale yellowish; rest of legs fuscous; 

 wings pure hyaline, veins indistinct. 



Female. — Dull black, opaque, clothed with short whitish pubescence; 

 palpi whitish; antennae dark fuscous. Thorax finely and densely punc- 

 tured ; scutellum triangular, polished, the side spaces smooth and po- 

 lished, the sutures as well as the basal excavation, crenulated ; meta- 

 thorax with several irregular, indistinct elevated lines ; tegulae pale 

 yellowish. Wings ample, pure hyaline, iridescent; nervures and stigma 

 hyaline, indistinct. Legs pale yellowish ; the coxae, trochanters, four 

 posterior femora, tips of posterior tibiae and most of their tarsi, fuscous. 

 Abdomen short and stout, depressed and very uneven, not distinctly 

 sculptured, entirely dull piceous-black ; ovipositor short, thickened at 

 tip. Length 1 line; expanse of wings 21 lines. 



Collection. — Ent. Soc. Philad. Three specimens. 



Microgaster iridescens, n. sp. 



Yellowish ; head, antennae, metathorax and most of posterior legs, piceous : 

 wings hyaline, strongly iridescent. 



% 9 . — Yellowish, pubescent ; head piceous-black, mandibles testa- 

 ceous, palpi whitish; antennae nearly as long as the body in $ , longer 

 in % , fuscous, paler at base beneath. Thorax yellowish, closely and 

 minutely punctured ; scutellum triangular, yellow, densely punctured, 

 black at extreme tip ; postscutellum and metathorax piceous, the latter 

 with several well defined elevated lines ; tegulae yellowish-white. Wings 

 hyaline, with a strong greenish iridescence, slightly pubescent ; ner- 

 vures and stigma pale fuscous ; cells shaped much as in 31. margini- 

 ventris, except that the areolet is minute and nearly complete. Legs. 

 including the coxae, pale yellowish; tips of the posterior femora, their 



