ICHNEUMON-FLIES, PART 2\ EPHIALTINAE 109 



Biological data associated with the specimens are meager. One 

 female was collected while ovipositing in a conifer, a male was reared 

 from a log of Picea canadensis infested with Tetropium cinnamopterum, 

 another male reared from Ptosima gibbicollis in Cercis canadensis, a 

 female reared from Pinus ponderosa, and another female reared from 

 Pseudotsuga taxtfolia. It has been assumed that the species is para- 

 sitic on wood boring Coleoptera, and it has been an easy step for 

 someone rearing both the parasite and a coleopterous borer from a 

 piece of wood to conclude that the borer was the host. More careful 

 work, however, has shown that this and related species are parasites 

 in the cells of bees and wasps nesting in wood, so the above records 

 from Coleoptera seem incorrect or very doubtful. The only indis- 

 putable host record is a female reared from a prepupa of Rygchium sp. 

 in a tube bored in a stick of wood (a "trap nest"), the nest collected 

 at Derby, N.Y., by L. H. Krombein and the rearing completed by 

 K. V. Krombein, Aug. 17, 1958. 



This species is transcontinental in the Canadian and Transition 

 zones, and a form only slightly different is in northern Europe. It is 

 adult from about June 1 to October. It has been reared from a 

 vespid nest in wood. 



6. Anastelgis, new genus 



Figure 288,a 



Front wing 6 to 16 mm. long; body long and slender; face and 

 clypeus black or blackish, or the clypeus ferruginous or brown; clypeus 

 moderately wide, weakly convex, its apical part depressed and with a 

 deep median apical notch; occipital carina complete, dipped on the 

 midline; hair on mesoscutum varying from moderately dense and 

 evenly distributed to almost absent; median part of outer face of 

 mandible with punctures which tend to run together as longitudinal 

 striae; submetapleural carina complete or almost so; propodeum with- 

 out carinae; areolet sub triangular, longer than high, receiving second 

 recurrent vein well before its apex; nervellus broken near middle, a 

 little above middle, or in some extralimital species a little below 

 middle; first tergite moderately long, its lateral carina present or repre- 

 sented by a strong ridge, its median dorsal carinae extending about half 

 its length; basolateral grooves on second tergite sharp, extending about 

 0.55 the length of the tergite; third and fourth tergites with prominent 

 tubercles, their apical impunctate area occupying about 0.2 their 

 length; female subgenital plate with a large median basal membranous 

 area; ovipositor sheath about 1.35 as long as front wing; ovipositor 

 straight, cylindric, its apex as in figure 330,b. 



Genotype: Anastelgis terminalis, new species. 



