•8o TRANS. ST. LOUIS ACAD. SCIENCE. 



Three ? ; d* unknown to me. Two ? are smaller, and yet 

 have as long an ovipositor as the larger § , and in hot h these two 

 the I St abdominal joint is entirely black on its basal f and the ist 

 recurrent vein has a stump of a vein at its angle, neither of which 

 characters occur in the large 9 . 



Cryptus frater, Cress. — $. — The antennae are rufous, shading into 

 brown-black on the extreme base and tip, 4 as long as the body; ist joint 

 of the flagellum 4 times as long as wide, the rest gradually shorter and 

 shorter. The parapsidal grooves of the thorax are distinct and acute but 

 not impressed. The carinae of the metathorax are obsolete, except the 

 cross-carina; of the lateral areas, which are continuous with each other, 

 and a trace of their terminal angles. Areolet in a. regular pentagon. 

 Radial area very short, its posterior angle about ioo°. Length $ .20 

 (27 Cress.) inch. Front wing $ .16 inch. Ovip. .03 inch. 



One 9 ; S' unknown to me. The terminal 3 or 4 abdominal 

 joints are in my specimen greatly retracted ; otherwise it would 

 measure more in length. 



Cryptus? albiSOleatus, n. sp. P—cJ'.— Black, Head opaque, closely and 

 very finely punctate, subglabrous and polished on the clypeus and espe- 

 cially on the vertex. Clypeus hunched and transversely oval. Palpi very 

 pale rufo-fuscous. Antennae | as long as the body, very robust, being as 

 stout as the middle tibiae, brown-black, tinged with rufous beneath at the 

 extreme tip ; joints very distinct. Joint i of the flagellum twice as long as 

 ■wide, the rest very slowly shorter and shorter. Thorax with fine, close-set 

 punctures, polished above, where the punctures are finer and more sparse, 

 subopaque beneath ; scutelflat; parapsidal grooves distinct and impressed 

 on the anterior \, thereafter suddenly obsolete. Metathorax opaque and 

 rather coarsely rugose; the hind carinae of the lateral areas distinct and 

 prominent at the aijgles in a rectangular tooth, their cross-carinae also 

 indistinctly present; posterior area large and pentagonal ; the other areas 

 obsolete. Abdomen rufous, oval, 4^ times as long as wide, subpolished, 

 •with almost microscopic, rather sparse punctures. First joint thrice as 

 long as wide, thrice as wide at tip as at base, its sides straight and slight- 

 ly divergent t of the way to the tip, where the large rectangular tubercles 

 are placed, thence subconvex and subparallel. Joint 2 wider by \ than 

 llong, and twice as wide behind as before; the rest rapidly shorter and 

 shorter. Joint 3 with a subobsolete, transverse, medial, capillary, dark 

 line; 5-8 obfuscated, and 7 almost entirely covered by a whitish spot. 

 Venter rufous, the tip as well as the penis dusky. Legs pale rufous. The 

 basal trochanters in all 6 legs and the 4 hind coxae black; middle tibiae 

 faintly, hind tibiae strongly, obfuscated; 4 hind tarsi white, with the basal 

 § of jomt I, and the whole of 5, pale fuscous. Wings subhyaline; veins 

 black, stigma dusky. Radial area short, its posterior angle 120°. Areolet 

 in a regular pentagon. Length (j? .25 inch. Front wing ^ .18 inch. 



