206 E. T. CRESSON. 



15. helvus. 



Ichneumon helvus, Cress. Trans. Am. Ent. Soc. i, p. 312, 9 . 



Phygadeuon hilaris, Prov. Nat. Can. vi, p. 284, % . 

 Hah. — Can., Mass., Ct., Pa., 111. Much the same form as tuher- 

 culi/rons ; ferruginous, shining; head large, subquadrate; mandibles 

 large, broad, black, lower edge sinuate; antenna? short, with apex 

 black ; head and thorax closely and strongly punctured ; wings sub- 

 hyaline; legs slender, simple; abdomen fusiform, shining, impunc- 

 tured, gastrocoeli obsolete. Length 9 .30 — .40 inch. 

 This probably belongs to Coljjoi/mtthus, Wesm. 



IG. pyriformis. 



Jschnus pi/ri/armis, Prov. Nat. Can. vii, p. 109. 



Uab. — Can., N. Y. Same form as fimgor, but with smaller head ; 

 pale ferruginous ; face, elypeus, mandibles, anterior orbits, scape be- 

 neath, line on collar, tegulre, line before, and one beneath, scutellum, 

 and four anterior coxa; and trochanters white or yellowish; large spot 

 on vertex covering ocelli and extending to base of antennae, tips of 

 mandibles, antennae above and sutures of thorax, black; inferior tooth 

 of mandibles very short; wings hyaline; legs slender, simple; abdo- 

 men slender, cylindrical, shining, gastrocoeli obsolete. Length % 

 .35 inch. 



Probably referable to Herpestomus, Wesm. 



DESIDERATA. 



Ichneumon nigratorius, Fabr. Syst. Piez. p. 55. — Scutello albo, thorace im- 

 maculato, corpore atro; orbita oculoruin albicante. Magnitude I. pisorii. Corpus 

 totuin atrum, niti(ium antennarum fascia, oculorum orbita scutelloque albis. 

 Habitat in America boreali. 



Brulle, Hym. iv, p. 305, gives the following description of this 

 species : 



9 . — II est noir, avec un anneau aux antennes et une tache sur I'^scusson, 

 jaunes. Les ailes sont transparentes, legerement jaunatres, avec les nervures, 

 et le stigma surtout, d'un jaune roux. Le thorax est ponctu^; I'escusson Test 

 peu ou point; le m^tathorax est fortement rugueux et comme ride en travera, 

 avec des lignes saillantes qui se croisent diversement; le trois premiers seg- 

 ments de I'abdomen sont couverts de points tres-serr^s et sontmeme finement 

 Btries au milieu ; les autres segments sont a peine ponctues. Longueur; 0,018. 

 Hab. la Caroline. 



We have several species that answer tolerably well to the above 

 descriptions, but all are too small — not over .60 inch, /. pisorius — an 

 European species, with which nigratorius is compared for size, is very 

 large, being from .80 — 1 inch in length. 



