DIPTERA. 



3. Sphaerophoria ? 



Female. Front shining black, on tbe lower two-thirds yellow along tbe orbits. Antennse reddish-yellow, black 

 on the upper border of the third joint. Face yellow ; sometimes a brownish spot on the tubercle. 

 Mesonotum shining bronze-green j the yellow of the margins truncate at the suture ; postalar callosities 

 yellow. Scutellum yellow, somewhat reddish on tbe disc. Pleurse and metanotum shining blue, with 

 tliree or four yellow spots. Abdomen black ; the sides of the first scgment, a straight band on the 

 second segment, and a gently arcuate band ou the third segment yellow ; the yellow of the fourth segment 

 coiisists of two slender rectangular spots, bordering the front margin, and separated by a narrow space 

 along tbe middle — within the rectangular space an oval oblique spot, contiguous with the posterior ramus ; 

 fifth segment with four longitudinal spots, more or less blended in front. Legs light yellow, the hind 

 tibiae at the base and tip, and the hind tarsi light brownish. Wings nearly hyaline. 



Male. Frontal triangle with a shield-shaped black spot. The oblique spots of the fourth abdominal segment 

 larger, and more broadly blended with the posteriorly directed stripe, the whole partly or entirely sepa- 

 rated from the basal yellow interrupted band. Hypopygium small. 



Length 6-8 millim. 



Hab. Mexico, Omilteme 8000 feet, Amula 6000 feet, and Acaguizotla 3500 feet, all 

 in Guerrero, Cuernavaca (H. H. Smith). 



Two males and six females. 



4. Sphserophoria ? 



Male. Face and frontal triangle ycllow, the former with a black stripe, the latter with a small black spot. 

 Mesonotum deep green, but little shining ; lateral stripe truncate at the suture ; a yellow spot on the 

 postalar callosities. Pleurse shining blue-black, with a yellow spot above. Abdomen opaque black ; the 

 margins of the incisures, except of the first, shining : first segment with yellow sides ; second segmenfc 

 with an interrupted band, connected on the lateral margins with the yellow of the first segment ; third 

 and fourth segments each with a broad, nearly straight, yellow band ; fifth segment yellow, save a trans- 

 verse sbining black spot behind. Hypopygium small. Legs yellow ; coxa3 black ; hind femora with a 

 broad brown ring ; hind tibia), except the base, and the hind tarsi brown. Wings nearly hyaline. 



Female. Face and front yellow, the latter black on the upper part. First abdominal band not interrupted by 

 a slender line. 



Lengtb 8 millim. 



Hab. Mexico, Xucumanatlan 7000 feet (//. H Smith), Ciudad in Durango, 

 8100feet(Jbrrw). 



Two specimens. 



I feel confident that the male and female specimens here described are of the same 

 species, notwithstanding the absence of the black facial stripe in the latter. How great 

 other variations may be, I, of course, cannot say, but I suspect that a large number of 

 specimens may show not a few. 



5. Sphserophoria ? 



Female. Face yellow, with a broad black stripe. Antennaj brown, the third joint largely yellowish-red. 

 Front black, the sides on the lower half yellow ; rather broad above. Mesonotum dark green, but little 

 shining ; lateral stripe truncate at the suture ; a spot on the postalar callosities. Scutellum yellow. 

 the extreme edge brown. Abdomen opaque black, witb the incisures shining ; sides of the first segment, 

 an interrupted band on the second, and a complete band on the third, fourth, and fifth segments 

 yellow; the tbree posterior bands have the hind margin bilaterally oblique, straigbt, and angulated 



