266 [September 



17. Mesoleptus distlnctus, n. sp. 



Black: spot on mandibles, palpi, inner side of antennse at base and tegulfe, 

 yellow; wings hyaline, iridescent, areolet triangular, petiolated; legs and most 

 of abdomen, pale rufous. 



Female. — Black ; spot on mandibles and the palpi, pale yellowish ; 

 eyes large, prominent, approximate beneath the antennse ; antennae por- 

 rect, nearly as long as the body, black, the 3rd to 6th or 8th joints yel- 

 lowish on the inside. Thorax thinly clothed with a short, fine, pale, 

 glittering pubescence ; tegulte pale yellowish ; metathorax with the ele- 

 vated lines well defined. Wings very faintly tinged with fuscous, beau- 

 tifully iridescent ; nervures and stigma fuscous ; areolet small, triangu- 

 lar, petiolated. Legs pale rufous, all the trochanters beneath pale yel- 

 lowish, the posterior tibise slightly obfuscated, the posterior coxfe mostly 

 black. Abdomen rather slender, broad and subcompressed at tip, ru- 

 fous, the first, second except tip and the base of the third segments, 

 black, the fifth and sixth segments sometimes obfuscated ; ovipositor 

 exserted about one line. Length 3 lines ; expanse of wings 4i lines. 



Hah. — New Jersey. E. T. Cresson. 



Easily distinguished from all other species known to me, by the basal 

 joints of the antennae being yellowish on the inside. 



18. Mesoleptus porrectus. n. sp. 



Black ; most of mandibles, palpi and tegulse, yellowish : legs and abdomen, 

 pale rufous ; wings hyaline, areolet minute, oblique, petiolated ; ovipositor 

 nearly as long as the abdomen. 



Female. — Black ; most of the mandibles and the palpi, yellowish ; 

 antennae three-fourths the length of the body, black above, somewhat 

 piceous beneath ; tegulae yellowish ; metathorax with the elevated lines 

 tolerably distinct, the central area narrow and very elongate. Wings 

 hyaline, iridescent ; nervures and stigma fuscous, the former yellowish 

 at base ; areolet minute, oblique, petiolated. Legs, including the coxae, 

 entirely yellowish-rufous. Abdomen slender at base, very broad and 

 much compressed at tip, which is abruptly truncate, the ovipositor, which 

 is more than half the length of the abdomen, is porrect; extreme base 

 of the first segment and the middle of the three apical segments, black- 

 ish, the remainder yellowish-rufous. Length 3 lines ; expanse of wings 

 4i lines. 



i/ai.— Delaware. Dr. Thos. B. Wilson. 



