TRIGONALID WASPS — TOWNES 301 



Male: ForeAving about 7 mm. long. Black. Front orbit, part of 

 hind orbit, clypeus except apical margin and usually a median area, a 

 spot above antennal socket, front face of mandible, anterior part, 

 upper edge, and hind corner of pronotum, a line inside of notaulus, 

 a narrow line on mesoscutum next the forewing, a mark on upper part 

 of mesopleurum, a pair of large spots on scutellum, most of postscutel- 

 lum, a pair of spots on propodeum, a yellow apical band on second 

 tergite, narrower apical bands on most of the other tergites, large 

 lateral apical dashes on second sternite, usually similar but smaller 

 marks on some of the other sternites, and most of legs yellow; coxae, 

 except apically, blackish; femora behind and often above brown; 

 hind tibia apically brownish; flagellum tinged with fulvous beneath; 

 wings hyaline, the front wing brown anteriorly, darkest in the radial 

 cell. 



Female: Forewing about 7.5 mm. long. Colored similar to the 

 male but with the yellow marks a little more extensive. The apical 

 tooth on the second sternite is deeply notched. 



Specimens: 22 cfcf, 28 9 9 from Maryland (Cabin John, Plum- 

 mers Island, and Takoma Park); Massachusetts (Falmouth); New 

 York (Huntington, Ithaca, Taughanic, West Point, and Woodlands); 

 North Carolina (Burnsville, Haim*ick, Southern Pines, and valley of 

 the Black Mountains); Ohio (Ross County and Scioto County); 

 Penns3dvania (Castle Rock, Dauphin, Glenside, and Mount Holly 

 Springs); South Carolina (Greenville); Virginia (Arlington, East 

 Falls Church, Falls Church, Glencarlyn, Great Falls, Mount Vernon, 

 Rosslyn, and Vienna); and West Virginia (Kanawha Station). 



Collection dates are mostly from June 25 through August 4, with 

 no apprent trend towards protandry. Dates outside of this range are: 

 June 10 in Scioto County, Ohio; June 15 at Plummers Island, Md.; 

 August 19 at Hamrick, N. C; August 30 and September 6 at Falls 

 Church, Va.; and October 31 at Southern Pines, N. C. One male and 

 two females were reared from Phosphila turbulenta (Noctuidae), prob- 

 ably as a secondary parasite, at Falmouth, Mass., June 30, 1928, and 

 July 11, 1928. One male was collected at honeydew on Liriodendron. 



Remarks: This species is seen in semishade of rich woods with 

 abundant undergrowth, at the 20- to 40-centimeter level. In general 

 appearance it resembles a robust sphecoid wasp but may be distin- 

 guished in life by its slender, fast vibrating antennae. The oviposi- 

 tion habits are generally similar to those described for Orthogonalys 

 pulchella, but the females move more quickly and seem to scatter 

 their eggs more widely. They take a little longer to place each egg 

 and appear as if inserting them through the lower epidermis into the 

 leaf tissue. In this action the heavy tooth on the apex of the second 

 sternite appears to hold the upper edge of the leaf while the apex of 



