152 HYMENOPTEKA. 



metanotum are broadly black. Areolet 5-angled ; the lateral nervures but slightly con- 

 verging above. 



This is a smaller species than either /. celatus, or I. jalapensis ; the former has the 

 metanotum much more hollowed in the middle, the gastrocceli visible, although not 

 very distinct, and it differs otherwise in coloration ; the latter has the gastrocceli very 

 distinct, and the tibiae and tarsi white. 



34. Ichneumon jalapensis. 



Ferrugineus ; antennis pro majore parte, facie, scutello, tibiarum posticarum dimidio basali tarsisque posticis 

 flavis ; geniculis posticis tibiarumque posticarum apice late nigris ; alis byalinis, nervis nigris, stigmate 

 nigro, basi albo. 



Long. 10 millim. 



Hah. Mexico, Jalapa (Bilimelc). 



Antennae as long as the thorax and abdomen together, stout, covered with a micro- 

 scopic pile, the base and apex darker than the central parts, which are distinctly 

 yellowish. Head finely punctured, and with a broad, flat ridge down the centre of the 

 face. Thorax coarsely punctured. Scutellum rounded, broader than long. Metathorax 

 coarsely punctured, the areae all defined, a tubercle on each side, and the apex with 

 a rounded gradual slope. Postpetiole rather strongly punctured, the sides depressed ; 

 base of second segment with longitudinal broad striations, its apex black. Gastrocceli 

 large, coarsely striated, rest of abdomen closely punctured. Areolet 5-angled, the sides 

 but slightly converging above. 



35. Ichneumon tumidulus. (Tab. VII. fig. 12.) 



Ferrugineus ; abdominis segmentis 3° et 4° basi, tibiarum posticarum apice tarsisque posticis nigris ; antennis 



nigris, medio albo, basi late rufa ; alis fiavo-hyalinis ; nervis testaceis. 

 Long. 12 millim. 



Hah. Mexico, Northern Sonora {Morrison). 



Head rather tumid, not very largely excavated above the antennae, finely punctured. 

 Thorax closely and rather coarsely punctured, the punctures running into striae on the 

 pleurae and mesonotum. Pronotum in front raised into a conspicuous margined ridge, 

 and in front of this, and touching the head, is a smaller ridge, forming between them 

 a large (comparatively) furrow, which widens as it reaches the sternum, and is trans- 

 versely striated. Scutellum large, broader than long, rounded and narrowed behind, not 

 much raised above scutum. Metathorax large, rounded behind, the middle slightly ex- 

 cavated ; the areae not clearly defined ; a well-defined keel over the excavated apex, and 

 a blunt tubercle at the side on this keel. Postpetiole broad, finely striated, the sides 

 scarcely depressed. Gastrocceli rather small, deep at base, finely punctured ; the rest of 

 the abdomen finely and closely punctured ; the apex acute ; cerci long, conspicuous ; 

 ovipositor projecting beyond them, black. Coxae rather strongly punctured ; femora 

 less so ; posterior coxae excavated on outside, the hollow transversely striated. The 

 suture between the meso- and metapleurae is broadly black. Legs and antennae stout ; the 



