32 bulletin: museum of comparative zoology. 



similar very small one at its base. Wings hyaline, the veins fuscous or piceous; 

 stigma narrowly lanceolate, dark brown, white at the base. Submedian cell 

 in anterior wing distinctly longer than the median, cubitodiscoidal vein with 

 no stump of a vein; areolet very small, subrhomboidal or nearly triangular, 

 with a long petiole above; receiving the recurrent nervure at its middle. 

 Transverse median vein in hind wing broken at the middle. 



Type.— No. 2102, M. C. Z., Florissant, Col. (No. 74, S. H. Scudder 

 Coll.). 



One specimen, seen in dorsal view. This has the general habitus 

 of a species of Ichneumon, but the ill-defined carinae of the metanotum 

 and the peculiar subrhomboidal areolet in the wing place it rather 

 definitely as a species of Trogus or of some closely related genus. 



All of the species from Florissant that I have satisfactorily referred 

 to the Ichneumonini belong to the genus Ichneumon. Amblyteles has 

 been found by Sehoberlin ('88) in the Upper Miocene of Oeningen. 



In addition to these there is a record by Brischke ('86) noting the 

 occurrence of Ichneumon in Baltic Amber, and many others referring 

 to the same genus, but most of these are made in such a vague and un- 

 satisfactory way that they can be considered as little more than the 

 use of the term Ichneumon to designate any member of the Ichneu- 

 monidae. The following, however, can be more definitely placed: — 



Ichneumon inf emails Heer ('65) on account of its elongate ovipositor 

 is probably a cryptine. 



Ichneumon longaevus Heer ('49) is apparently a true Ichneumon. 



Ichneumon petrinus Scudder ('90) to judge from the excellent figure 

 is a braconid belonging to the Spathiinae. The discoidal and first 

 cubital cells are separated only apically according to the description, 

 but the basal part of the cubitus has most likely been lost. The form 

 of the head and thorax particularly are exactly similar to Hormiopterus 

 and its allies. 



Ichneumon Linne. 



This genus is represented in the material at hand by ten species, 

 many of them referable with some certainty to some of the subgenera 

 established for recent forms of this very extensive group. One pecul- 

 iarity exhibited by a number of the fossil species is the shortening of 

 the upper or radial side of the areolet. This gives the wing a peculiar 

 appearance, but is I think of secondary importance as these species agree 

 otherwise with genuine species of Ichneumon. 



