NEARCTIC STEPHANIDAE — TOWNES 363 



Black. Second and third abdominal segments, first abdominal seg- 

 ment except more or less of its base, and sometimes the fourth 

 abdominal segment of male basally, ferruginous; labrum, ventro- 

 lateral triangles on frons of male, basal 0.15 to 0,3 of tibiae, apices 

 of front and middle femora, and a very broad subapical band on 

 ovipositor sheath white; tegula brown; extreme base of wing white; 

 forewing light brown beyond the basal vein, with a narrow hyaline 

 band diagonally across the discal cell and across the base of the second 

 discoidal cell; apical 0.5 of hind wing light brown; tarsi whitish to 

 light brown, darkest apically. 



Specimens. — 9 5 , 21 2 , from Arizona (Cochise County) ; British 

 Columbia (Pender Harbor, Robson, and Vancouver) ; California 

 (Alta, Bass Lake, Cisco, Fallen Leaf Lake in El Dorado County, 

 McCloud, Meyers, Pinecrest, Porterville, Riverton in El Dorado 

 County, and Yreka) ; Idaho (Coeur d'Alene) ; Oregon (at 6,500 feet 

 on Antelope Mountain in Harney County, and Ashland) ; and Wash- 

 ington (Ashford, Mount Rainier, and Kooskooskie in Walla Walla 

 County) . Dates of collection run from June 1 to August 29. 



This species has about the same range as Pseudotsuga taxifolki 

 (Douglas fir) and seems to be most common in forests of this tree. 



Genus MEGISCHUS Brulle 



Plate 25, Figure 2 



Megischus Brull6, Histoire naturelle des insectes, Hym^nopteres, vol. 4, p. 537, 



1846. Type: {Meyischus annulator Brulle) =/Mrccr<?/s Lepeletier and 



Serviile. Designated by Viereck, 1914. 

 Bothrioccnis Sichel, Ann. Soc. Ent. France, ser. 3, vol. 8, p. 759, 1860. Type: 



Bothriocerus europoeus Sichel. Designated by Viereck, 1914. 

 Hemistcphanus Endeblein, Stettin. Ent. Zeit., vol. 67, p. 301, 1906. Type: 



Stephanus macrurus Schletterer. Original designation. 



Megischus is a pantropic genus containing about 60 described spe- 

 cies, but at least 20 of these appear to be synonyms. Most of the 

 species now stand in literature under the generic name Stephamis. 

 Megischus differs most conspicuously from Stephanus and Schletter- 

 erius in having only three segments in the female hind tarsus, and from 

 all other genera in the family in its more complete venation. 



Five Nearctic species are included, divisible into three species groups 

 as indicated in the key to species. 



KEY TO THE NEARCTIC SPECIES OF MEGISCHUS 



1. First tergite mat, smooth; pronotnm mat {texanus group) 2 



First tergite polished and with conspicuous transverse wrinkles (pi. 25, fig. 2) ; 

 pronotum polished 3 



