104 



U. S. NATIONAL MUSEUM BULLETIN 216 



Metopius coreanus Uchida, 1930, from Korea, is closely related to 

 the present species. It differs in having the facial shield narrower, 

 about 1.17 as high as wide. 



Specimens: 29, Edmonton, Alta., July 15 and 26, 1929, E. H. 

 Strickland (Ottawa), c? (type), Washington Territory (Philadel- 

 phia). cT, July 4, 1914, Max Riihmann (Ottawa). 



4. Metopius (Tylopius) basalis Cresson, new combination 



Figure 186,e 



Front wing 14 to 15 mm. long; facial shield rounded below, without 

 a trace of a basal point, about 1.16 as high as wide and separated from 

 clypeal margin by about 0.10 its height; second recurrent vein with 

 one bulla; abdomen slender, its fourth tergite about 1.03 as long as 

 wide; second tergite rather sparsely punctate, the interspaces about 

 0.7 the diameter of the punctures; sixth tergite of female about 1.2 

 as long as wide, with coarse, evenly spaced punctures; seventh tergite 

 of male with rather coarse, evenly spaced punctures. 



There are two subspecies, differing in the extent of white marks on 

 the abdomen, as follows: 



1. Abdominal tergites 3 to 5 each with an ivory apical band or apicolateral pair 

 of spots (fig. 186,e); range: Transcontinental in Canadian zone. 



4a. basalis heinrichi, new subspecies 

 Abdominal tergites 3 to 5 entirely black; range: Austroriparian fauna. 



4b. basalis basalis Cresson 



4a. Metopius (Tylopius) basalis heinrichi, new subspecies 



Figure 186, e 



Male: Black, the abdomen with a faint dark metallic blue tinge. 

 Face, clypeus, more or less of cheek, interantennal process, under 

 side of scape and pedicel, mouthparts, mark along upper edge of pro- 

 notum, subtegular ridge, large vertically oval spot on upper front 



Figure 68. — Localities for 

 Metopius (Tylopius) basalis 

 heinrichi. 



