5 PROCEEDINGS OF THE XATIOXAL MUSEUM vol. 79 



2. Color of body either predominantly yellow of different shades, 



or predominantly black ; if yellow, not more than minor parts 

 black, such as ocellar area, occiput narrowly, mesonotum on 

 disks of prescutum or scutel narrowly, and anterior surface 

 and groove of propodeum ; if black, usually not move than 

 narrow orbital ring, front corners of pronotum, and some- 

 times venter of abdomen, yellowish (head of uigriceps at 

 times more yellow, but this species is known by its length and 



often reduced wing band) 3. 



Color of body mixed, varying in the different species, ranging 

 from black through brown to yellow, none of these colors pre- 

 dominating to the extent described above 14. 



3. Color predominantly yellow, or a shade of yellow more or less 



suffused with red or brown, width of submarginal band 



various 4. 



Color predominantly black, submarginal band usually not so 

 broad as length of marginal vein or stigma 12. 



4. Apicalmost part of distal margin of submarginal band extend- 



ing well beyond end of stigmal vein (pi. 1, figs. 2, 5, 6, et al.) 5. 



Apical part of the band not or barely reaching as far as end 



of stigmal vein (pi. 1, figs. 3, 4, 7, 12, et al.) 8. 



5. Length 1.5 mm., body slender, 10 or 11 setae on submarginal 



band, head, thorax, and abdomen almost, or sometimes en- 

 tirely, immaculate bright golden yellow texana (p. 22 t. 



Length 2 mm. or more, body moderately robust. 13 to 15 setae 

 on submarginal vein, body sometimes almost immaculate but 

 not bright golden, more or less darker than the above 6. 



6. Body color as if tarnished, yellow suffused with reddish brown. 



bicolor (p. 29). 

 Body color plain golden yellow 7. 



7. Submarginal band mostly very large, proximal margin moder- 



ately convex, distal margin sometimes greatly dilated and 

 forming almost an arc of a circle, sometimes both margins 

 moderately and about equally expanded, the band then jug- 

 shaped or one-fifth longer than broad disholcaspidis (p. 23). 



Submarginal band smaller, proximal margin straight or feebly 

 concave, distal margin never more than moderately dilated, 

 band about two-thirds as broad as long flava (p. 14). 



8. Funicular joints 2 to 5 (female) each about a third longer than 



thick, or 2 to 4 (male) twice as long as wide, antennae usually 

 smoky black, head often speckled dusky and body lightly in- 



fumated vaccinlicola (p. 12). 



Funicular joints as long as broad or scarcely longer (female), 

 or one-half longer than broad (male), antennae usually yel- 

 lowish or chestnut brown, body not speckled or plainly dusky 9. 



9. Submarginal band with a distinct neck at stigma, band well- 



separated from stigmal vein, body quite immaculate golden 

 brownish yellow, only anterior and groove of propodeum black. 



mimosae (p. 25). 

 Submarginal band not extremely constricted, body more black, 

 including ocellar area and propodeum in part, and dorsum 

 of abdomen 10. 



