ICHNEUMON-FLIES OF AMERICA: 1. METOPIINAE 71 



trochanters, apex and extreme base of front and middle femora, base 

 and dorsobasal half of front and middle tibiae, apical spot on hind 

 coxa beneath, hind trochanters except for base of hind first trochanter, 

 extreme base of hind femur and of hind tibia, apex of hind femur, 

 apical 0.65 to 0.75 of first tergite, lateroapical corner of second tergite, 

 apical 0.25 ± of third and fourth tergites, apical 0.2 of fifth tergite, 

 apical margin of sixth tergite of male, and most of male genitalia, 

 yellow; antenna light brown basally, shading to blackish toward 

 middle, blackish beyond middle; front and middle legs fulvous, or 

 their coxae and femora fulvous to blackish, except where described as 

 yellow; hind coxa ferruginous to blackish except for its apical yellow 

 spot; hind tibia and tarsus brown to black; wings tinged with brown, 

 the front half of front wing medium brown. 



Type: 9, Takoma Park, Md., July 11, 1942, H. and M. Townes 

 (Washington, USNM 63615). 



Para types: 22 c?, 109, from Arkansas; Georgia (Tallulah Falls); 

 Maryland (Plummers Island and Takoma Park) ; Michigan (Douglas 

 Lake and Whitefish Point in Chippewa Co.); New Jersey (Moores- 

 town, Westfield, and Westville) ; New York (Farmingdale, Roslyn, 

 and Sea Cliff) ; Oklahoma (Chickasha) ; Virginia (Dunn Loring and 

 Westmoreland State Park in Westmoreland Co.); and Wisconsin 

 ("Cranmoor"). 



Males have been taken from June 15 to July 17 and females from 

 June 20 to July 22, with a single female in "August" from Douglas 

 Lake, Mich. This seasonal distribution indicates a single generation 

 per year. We ourselves have collected the subspecies on 10 different 

 dates, always among sunlit scrubby oaks. The species in flight looks 

 like a slender Ancistrocerus or similar small eumenine wasp. One of 

 our specimens was collected resting under a leaf of Rhus toxicodendron. 

 A male, collected at Takoma Park, Md., on July 2, 1944, was found 

 in woods, flying about foliage in the manner of a male Exochus, about 

 three meters from the ground. 



This subspecies occurs among sunlit scrubby oaks in the Carolinian 

 fauna. It is on the wing from mid-June to late July. The name is 

 in honor of K. V. Krombein, who collected a number of the paratypes. 



4. Metopius (Metopius) pulchellus Cresson 



Front wing 9 to 11 mm. long; lower tooth of mandible lacking 

 entirely; punctures on facial shield rather small, strong, and of irreg- 

 ular size, their interspaces about 0.4 their diameters; punctures on 

 mesopleurum coarse, very strong, subadjacent; punctation of meta- 

 pleurum similar to that of mesopleurum but a little coarser; first 

 tergite about 0.78 as long as wide, in profile strongly rounded above, 



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