NATURAL SCIENCES OF PHILADELPHIA. 113 



nulus ; wings hyaline, stained witli yellowish. Form robust ; an- 

 tennre of 9 robust, involute, of % porrect ; body densely punc- 

 tured ; scutellum prominent, flat above, with carinate sides ; 

 abdomen longitudinally aciculate above. Length 6^ lines. 

 Orizaba; Cordova. (Sumichrast, No. 120.) 



9. Ichneumon ablutus, n. gp. 



9. Dull honey-yellow; antennfc with broad yellow annulus, 

 apex black, and base yellowish-brown ; wings hyaline, nervures 

 and stigma honey-yellow; head buccate; antennae involute, joints 

 short and robust ; thorax depressed, shagreened ; scutellum flat ; 

 metathorax with well-defined elevated lines, forming a quadrate 

 central area, apex truncate and excavate, with short, prominent, 

 subacute lateral tubercles ; legs robust ; abdomen oblong-ovate, 

 basal segment gradually dilated to apex, with a long, rather 

 slender petiole, the apex above faintly aciculate ; remaining seg- 

 ments smooth, shining, and subpubescent, except base of second, 

 which is faintly transversely aciculate ; gastrocoeli obsolete. 

 Length 4 lines. 



Orizaba. 



10. Ichneumon passivus, n. sp. 



?. Dull honey-3^ellow, opaque; antennre black, with a narrow 

 yellowish annulus, base reddish ; face yellow ; wings 3'ellowish- 

 hyaline, a dark line along basal transverse nervure, and a dark 

 spot covering areolet, the extreme apex faintly clouded ; meso- 

 thorax and base of second abdominal segment tinged with red- 

 dish-brown; base of third segment with a black band. Head flat, 

 not buccate, eyes large and prominent ; antennae slender, not in- 

 volute, joints elongate ; thorax shagreened ; scutellum flat above, 

 abrupt on sides, with carinate edge; metathorax gradually slop- 

 ing behind, with prominent, subacute lateral tubercles, the elevated 

 lines subobsolete ; wings ample, areolet small, triangular; legs 

 long and rather slender ; abdomen elongate, minutely punctured, 

 basal segment smooth and shining, witli long slender petiole, 

 rather suddenly dilated at apex ; gastrocoeli large, deep, and 

 transverse. Length 5^ lines. 



Orizaba. 



11. Ichneumon frivolus. 



Ichneumon frivohis, Cress., Trans. Am. Ent. Soc, ii. p. 11, %. 



Orizaba ; Cordova. 



