NO. 3533 CHALCID WASPS OF GENUS EURYTOMA — BUGBEE 453 



Hosts: Dorcaschema alternatum (Say) (Aslimead, 1888). Phloeotri- 

 bus frontalis (Oliver) (Peck, 1951, in Muesebeck et al., U.S. Dept. 

 Agric. Monogr., no. 2). 



Remarks: This species is similar to E. conica Provancher but differs 

 from it in the yellow legs without dark brown to black infuscation on 

 femora and tibiae. 



The two female specimens from White Fox, Saskatchewan, Canada, 

 differ slightly from the type female, but because of the all-yellow legs 

 and only two specimens for comparison, it seems best to mclude them 

 with E. dorcaschemae. 



The scanty host data suggest that the species is parasitic on wood- 

 boring beetles belonging to the families Cerambycidae and Scolytidae. 



6. Eurytoma semicirciila, new species 



Figures 12, 22; Map 3 



Female: Black. Averages 4.5 mm. (4.3-4.8) in length. Abdomen 

 averages 2.0 mm. (2.0-2.2) in length; oval in lateral view; sculpturing 

 on lateral aspect of sixth tergum heavy ventrally but extends only to 

 about middle of surface so that dorsal surface is smooth and shiny; 

 sixth tergum longer than three and four combined ; ninth tergum short 

 and stubby, averages .15 mm. (.12-.17) in length. Internal genitalia 

 averages 2.0 mm. in length and .50 mm. in height; height equal to 

 one-quarter the length; dorsal valves black and wide for horizontal 

 length; dorsal and ventral valves turn dorsally, anteriorly, only 

 slightly so that stylet arch is in a horizontal plane. Petiole longer 

 than wide and about half the length of the hindcoxa; anterior end of 

 petiole with a flat, rounded, dorsaUy projecting scale flanked on each 

 side by a bluntly pomted, dorsolaterally, projecting tubercle. Pro- 

 podeum with a narrow concavity; median furrow dorsally, with one 

 large or two round or slightly oval depressions with shiny surfaces, 

 followed below by a single row of round, shiny-surfaced depressions 

 that may be smaller toward base; lateral areas finely and evenly 

 punctate. Tegula black. Prothorax with two dorsally projecting 

 tubercles on anterior border, one on each side of middorsal line. 

 Median ocellus separated from two lateral ocelli by a raised, curved 

 carina. Compound eyes with a prominent carina along medial 

 margin. Short hairs on face may have a golden tinge. Antennae 

 filiform; joints longer than wide; first funicle joint about twice the 

 length of the pedicle; scape with outer face orange brown. Legs with 

 the coxae black; front coxae with a prominent, flared carina on 

 anterior face running diagonally from the upper, outer margin to 

 medial margin; rest of legs orange brown, except hindfemora which 

 may have some black infuscation mediaUy on outer surfaces. Wing 

 veins straw yellow to light brown in color; linear; marginal averages 



