132 U. S. NATIONAL MUSEUM BULLETIN 216 



The great majority of collecting dates are in July and August, but a 

 substantial number are in the last half of June and the first half of 

 September. 



Noteworthy early and late seasonal records are: June 10 at Moores- 

 town, N. J.; June 13, 19, 20, 21, 23, and 25 at Takoma Park, Md.; 

 June 24 at Bowie, Md.; September 19 at Princeton, N. J.; September 

 22 at Arlington, Va., and at Takoma Park, Md.; September 25 at 

 Bolivar, W. Va.; October 9 at Greenville, S. C; and October 31 at 

 Southern Pines, N. C. 



We have found the species common in deciduous woods in most 

 Carolinian fauna localities. Sometimes it and Colpotrochia trifasciata 

 are common in the same woods, but often they are not. Observations 

 indicate that the present species flies higher in the underbrush than 

 does C. trifasciata. 



This species is in the Carolinian fauna, where it frequents the 

 underbrush of deciduous woods. Adults occur mostly in July and 

 August. 



II. ELEGANTULA GROUP 



Areolet absent except in C.fultoni; nervellus vertical; lateral carina 

 of propodeum present, usually complete; epipleura of second tergite 

 relatively broad with the inner margin strongly bowed, more than 

 0.35 as wide as the tergite and usually meeting or overlapping medi- 

 ally; female subgenital plate scooplike (strongly convex). 



The elegantula group includes two Nearctic species and a number of 

 others from the Neotropics and the Old World. Besides the two 

 Nearctic species treated below, this species group contains Ichneumon 

 elegantulus Schrank 1781 from Eurasia, Colpotrochia nipponensis 

 Uchida 1930 from Japan, Exochoides mexicana Cresson 1868, from 

 Mexico, and Colpotrochia pilosa Cameron 1909 from the Oriental re- 

 gion. There are also a number of undescribed species. 



3. Colpotrochia (Colpotrochia) fultoni, new species 



Front wing 8.2 to 9.0 mm. long; areolet present; nervellus vertical, 

 broken a very little below the middle; lateral carina of propodeum 

 distinct, but thick and low; dorsal carinae of first tergite rather sharp, 

 fading out well beyond the spiracle; subgenital plate scoop-shaped. 



Yellow. Head, three broad stripes on mesoscutum coalescing in 

 front of scutellum, subdorsal spot on side of pronotum, posterodorsal 

 area on mesopleurum, sometimes triangular spot above and a short 

 stripe below position of sternaulus, and subbasal transverse bands on 

 third to fifth tergites, black. The interantennal lamella is narrowly 

 bordered with yellow. Flagellum brown, reddish below; base of hind 



