PROC. ENT. SOC. WASH., VOL. 23, NO. 5, MAY, 1921 111 



sternauli distinct; metapleurum granulate rugulose; propodeum mostly trans- 

 versally rugulose opaque, areolopetiolar area subpolished, deeply concave, 

 apophyses prominent; legs rather slender. Abdomen narrow fusiform; first 

 tergite gradually wider from base to apex, where it is a little more than a third 

 as wide as long, dorsal carinae highest just beyond spiracles, petiole striate, post- 

 petiole striate except between the high carinae where it is shagreened; abdomen 

 beyond first tergite barely half as wide as long; ovipositor sheath about as long 

 as first tergite. 



Black; abdomen piceous; antennae, clypeus, mandibles, palpi, legs, and tegulae 

 ferruginous to testaceous; wings hyaline, venation brownish. 



Type-locality. Kaslo, British Columbia. 



Type Cat. No. 24144, U. S. N. M. 



One female captured June 5, by Dr. H. G. Dyar. 



Genus THAUMATOTYPIDEA Viereck. 



The male of this genus has heretofore been unknown. In the 

 National Collection I have found a single specimen of this sex 

 that I have no hesitation in referring to the genus. The sexual 

 antigeny is so great that I do not attempt to associate it with 

 either of Ashmead's species, which differ so little from each 

 other that they may, with the study of more material, prove to 

 be synonymous. 



The male is almost exactly what one knowing the genus 

 Pezomachus might expect it to be. It is, in fact, to Myersia 

 what Pezomachus is to Hemiteles: with less completely areolated 

 more sloping propodeum; slender, subclavate, normally seg- 

 mented abdomen; and broad, rather weakly veined wings. 



The male differs from the female of the genus in having the 

 wings fully developed and the thorax normal; head shorter both 

 from above and in facial view; eyes and ocelli larger; malar space 

 much shorter; temples narrower antero posteriorly in other 

 words the head is normal as compared with that of the female 

 exactly as is the case in Pezomachus; antennae slender, not sub- 

 clavate, all flagellar joints (the apex is broken off) much longer 

 than broad; thorax with all sclerites normally developed, but 

 the propodeum with only the combined areola and petiolar 

 area and the apical lateral areas defined, the other carinae 

 entirely lacking; abdomen narrow, subclavate, depressed; 

 second and third tergite not fused; first tergite less strongly 

 curved and relatively shorter. 



From the male Pezomachus it is at once distinguished by the 

 very large and deep clypeal foveae; the posterior face of the 

 propodeum extending medially much nearer to the base; the 

 quite different venation, the stigma being narrow, the radial cell 

 long with the radius broken at a nearly acute angle, the practi- 

 cally contiguous radius and cubitus (the intercubitus almost 

 obliterated), the entirely wanting areolet and barely indicated 



