78 U. S. NATIONAL MUSEUM BULLETIN 216 



3. Hind tibia brownish ferruginous, paler basally; facial shield very broadly 



rounded below, without a trace of a basal point . . 1. comptus Cresson 



Hind tibia bright yellow, its apical 0.35 blackish; facial shield narrowly 



rounded and a little pointed below 2. scitulus Cresson 



4. Facial shield without a median longitudinal carina (fig. 168,b) 5 



Facial shield with a median longitudinal carina (fig. 168a) 8 



5. Claws of front and middle tarsi pectinate on their basal 0.65; glossa not pro- 



truding beyond galea; hind femur about 3.2 as long as deep. 



4. xanthostigma Ashmead 



Claws of front and middle tarsi pectinate on their basal 0.3 to 0.4; glossa 



protruding beyond galea; hind femur about 2.7 as long as deep .... 6 



6. Prepectal carina complete, extending dorsally to near subtegular ridge; dorso- 



basal face of first abdominal tergite normal, about 0.7 to 1.0 as long as 

 dorsal face; ovipositor about 1.4 as long as apical depth of abdomen. 



5. consector, new species 

 Prepectal carina incomplete, extending dorsally to just above sternaulus; 

 dorsobasal face of first abdominal segment extending most of the length 

 of the segment, the dorsal face obliterated or only about 0.3 as long as 

 basal face (fig. 168,b); ovipositor about 1.8 to 3.5 as long as apical depth 

 of abdomen 7 



7. Apicolateral corner of scutellum weakly produced, rather blunt; second ter- 



gite black, with the apicolateral corners yellow (fig. 185, b); upper margin 

 of pronotum with a yellow stripe; ovipositor about 1.8 as long as apical 



depth of abdomen 10. secundus, new species 



Apicolateral corner of scutellum distinctly produced (though not so strongly 

 as in most other species of the genus), acute; second tergite black, with 

 the apical margin yellow; upper margin of pronotum without a yellow 

 stripe; ovipositor about 3.5 as long as apical depth of abdomen. 



11. rileyi Marlatt 



8. Metapleurum almost impunctate; mesopleurum with a large yellowish spot. 



9. birkmani Brues 



Metapleurum with coarse, scattered punctures; mesopleurum entirely black 



or with rather small yellow spot just below the wing 9 



9. Second tergite with its apical 0.5 yellow; galea about 1.7 as long as wide; 



prepectal carina weak above 6. rufipes Cresson 



Second tergite with its apicolateral corners white (fig. 184,h); galea about 



2.2 as long as wide; prepectal carina strong above 10 



10. Facial shield about 1.6 as high as wide, its median carina rather indistinct; 

 subtegular ridge yellow; mesosternum with a yellow stripe next to ster- 

 naulus 7. pectoralis, new species 



Facial shield about 1.3 as high as wide, its median carina strong and sharp; 

 subtegular ridge and mesosternum entirely black . . 8. ultimatus Davis 



1. Metopius (Cultrarius) comptus Cresson, new combination 



Figure 184,d 



Metopius comptus Cresson, 1879, Trans. Amer. Ent. Soc, vol. 7, proc. p. xxviii; 9 . 



Type: 9 , Colorado (Philadelphia). 

 Metopius laticinctus Cresson, 1879, Trans. Amer. Ent. Soc, vol. 7, proc. p. xxix; 9 . 



Type: 9 , Colorado (Philadelphia). 



Front wing 8.5 to 9.0 mm. long; facial shield about 1.1 as high as 

 wide, without a median longitudinal carina, with coarse punctures 

 interspersed with smaller punctures, the punctures rather close; wider 



