November 1S93.J 



PSYCHE. 



553 



DESCRIPTIONS OF NEW ACULEATE HYMENOPTERA. 



BY WM. J. FOX, PHILADELPHIA. 



Pisonopsis gen. nov. 



Form stout; sculpture coarse: head as 

 broad as or slightly broader than the thorax, in 

 the cS ^ is distinctly broader; mandibles 

 distinctly notched on outer margin; eyes 

 reaching to the base of mandibles, their 

 inner margins converging a little towards the 

 vertex and rather strongly emarginate at 

 about the middle, in the $ they are but 

 slightly emarginate; ocelli round, regular 

 and distinct placed in a triangle; antennae 

 ample, placed immediately behind the 

 clypeus; shoulder tubercles not reaching to 

 tegulae; metathorax a little shorter than the 

 dorsulum ; marginal cell long, but not 

 reaching beyond the tip of third submar- 

 ginal, obtuse at tip, without appendicula- 

 tion ; three submarginal cells, the first more 

 than tzvo times longer than the other two 

 combined, the second petiolated, generally 

 though not always, receiving both recurrent 

 nervures, third submarginal narrow, wider 

 below than at the top; discoidal vein con- 

 fluent with the interno-medial vein ; stigma 

 short, truncate at tip; legs very feebly armed, 

 the anterior tarsi without comb, middle 

 tibiae with a single strong spur at apex, 

 tarsal claws entire; last dorsal segment of 

 the $ with a distinct pygidial area, in the 

 cf the last ventral segment roundly emar- 

 ginate at apex. 



From Pison it is distinguished by the 

 emarginate mandibles, the last dorsal 

 segment of $ with a pygidial area, its more 

 robust form and its coarse sculpture. From 

 the other Larrid genera that have the eyes 

 emarginate, i. e Aulacopliilus and Trypox- 

 ylon, the form of the abdomen will at once 

 separate it. 



Pisonopsis clypeata. $ .—Clypeus convex 

 medially, with large, scattered punctures, 

 produced anteriorly into a strong medial 

 tooth, at the base of the tooth the clypeus is 

 transversely impressed ; front with close, 

 rather coarse punctures, with a distinct, 

 medial, impressed line; ocelli slightly pitted, 

 forming an equilateral triangle; top of head 

 and cheeks shining, more finely punctured 

 than the front; first joint of flagellum a little 

 shorter than the second which is longer 

 than the third, dorsulum with distinct 

 punctures, those on the anterior portion 

 finest and closest; scutellum punctured like 

 hind portion of dorsulum; metathorax on 

 sides and posteriorly with coarse striations, 

 the upper surface with a somewhat triangu- 

 lar enclosure, which is on basal portion 

 obliquely ridged, on apical portion trans- 

 versely ridged ; legs strong, the tibiae and 

 tarsi with a very few weak spines; wings 

 subhyaline, iridescent, the apical margins 

 darker, recurrent nervures generally received 

 bv the second submarginal cell; in one 

 specimen the first recurrent nervure is con- 

 fluent with the first transverse-cubital 

 nervure; abdomen finely, though distinctly 

 punctured, the second and third dorsal seg- 

 ments rather strongly transversely depressed 

 basallj-; pygidial area triangular, finely 

 and closely punctured; black, the abdomen 

 rufous; sides of face, clypeus, sides of thorax 

 more or less and the apical margins of 

 abdominal segments 1-5, silvery. Length 

 9 mm. 



J. — Eyes scarcely emarginate within and 

 converging but little towards the vertex; 

 ocelli situated in a low triangle, the distance 

 between the hind pair more than twice 

 greater than the distance hetween them and 



