. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES: PARASITIC HYMENOPTERA. 31 cell are considerably longer, and the discoidal smaller and more elon- gate. This cell appears to be smaller than in any living species of Anlacns or allied genera with which I am familiar and suggests a relationship to Foenus (Gasteruption) in which this cell is very small. It would appear therefore that the present form may have been related to some of the transition forms between Foenus and the more general- ized Evaniidae. ICHNEUMONIDAE. ICHNEUMONINAE. Only one species, a Trogus, i
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BRUES: PARASITIC HYMENOPTERA. 31 cell are considerably longer, and the discoidal smaller and more elon- gate. This cell appears to be smaller than in any living species of Anlacns or allied genera with which I am familiar and suggests a relationship to Foenus (Gasteruption) in which this cell is very small. It would appear therefore that the present form may have been related to some of the transition forms between Foenus and the more general- ized Evaniidae. ICHNEUMONIDAE. ICHNEUMONINAE. Only one species, a Trogus, is contained in the collections from Florissant. Heer ('67) has described as Ichneumonites fusiformis a species which he thought probably a Trogus, but which from its sessile abdomen and long ovipositor is evidently a pimpline. Trogus vetus, sp. nov. (Fig. 21.) Probably a female. Length about 15 mm. Black, the abdomen pale brown with transverse black bands. Wings hyaline. Rather stout, head large and broadly transverse; antennae preserved only at the extreme base where they are rather slender. Face and front black, with a central pale yellowish brown spot above the insertion of the antennae. Mesonotum smooth or very finely shagreened; scutellum convexly elevated, with a. Fig. 21.— Trogus vetus, sp. nov. Type. depression at its base that is margined by a raised line on each side which does not extend to the raised portion. Metanotum partially areolated, there being a single large lateral area on each side separated from the single median one. Abdominal petiole black, the postpetiole margined narrowly behind with dull yellow or pale brown. Postpetiole finely punctate, the extreme tip rugose; second segment pale brown, with a transverse quadrangular black spot medi- ally; third with a much smaller., more nearly round dark spot; fourth with a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and
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