SYNOPSIS OF NORTH AMERICAN SYRPHID^. 99 



S,9. Length, 8 to 9™™. Faceyellow, with whitish dust on the sides, 

 antennae a little more reddish yellow, narrowly brownish or blaclvish 

 above. Frontal triangle yellow ; vertical triangle black, pollinose in 

 front of the ocelli. Front in female black, rather thickly yellowish- 

 whitish pollinose; on the sides below the ocelli narrowly yellow. Oc- 

 ciput grayish-yellowish pollinose, silvery on the sides. Median cin- 

 ereous stri])e of thorax very distinct ; on the upper border of the yellow 

 lateral stripe indistinctly glaucous green ; between these and the mid- 

 dle stripe the color is brownish or olivaceous, indistinctly divided by a 

 cinereous line, the beginning of which in front is dilated and very dis- 

 tinct. Pleuras shining metallic, with three yellow spots, viz., one on 

 the meso, one on the sterno-pleuniB, and one above the front coxae, 

 smaller than the others. Scutellum wholly yellow, somewhat reddish 

 on the disk. Abdomen shining black; first segment yellow at the base 

 and sides; second vsegment with a broad median entire yellow cross- 

 band ; third and fourth in the female with a narrow yellow anterior 

 border, and a slender median line, passing througu the rather narrow 

 interruptions of the rather broad median yellow cross-bands ; tifth seg- 

 ment yellow, except two rectangular, i)arallel, more or less confluent 

 black spots. In the male the third and fourth segments are yellow or 

 yellowish red, except a pair of black lines on each side, like the three 

 sides of a square, more or less indistinct ; fifth segment and the liy- 

 popygium wholly yellow. Legs bright yellow ; hind tarsi reddish, the 

 terminal joints blackish. Wings nearly hyaline, the stigma dilutely 

 yellow. 



Thirty specimens. 



Mesograpta pannila. 



Meso<jramma parvulaJuOQw , Centur., vi., 47. 

 Mesograpta parvula O&ten Sacken, Cat. Dipt., 125. 



Hahitat. — Georgia!, Florida (Lw.). 



^ , ? . Length, 5 to G™™. Black, somewhat metallic. Face yellow, 

 silvery pollinose on the sides. Antennae yellowish, somewhat infuscated. 

 Front in female very narrow above, shining greenish black, bronzed at 

 vertex, yellow on the sides below the vertex. Cheeks black; lateral 

 posterior orbits silvery. Median dorsal cinereous stripe only moderately 

 distinct, on either side of which, and more outwardly, separated by a 

 more shining stripe, a second, more olivaceous, less shining one. Pleurte 

 shining bluish black with a yellow spot on the mesopluras, and a more 

 whitish one below ; no spot above the front coxae. Scutellum black, 

 with a yellow margin. Abdomen black ; opaque, except the first seg- 

 ment, an anterior and posterior band on the second, and a posterior 

 band on the following segments, shining; yellow markings as follows: 

 base of the first segment, sometimes a slender band on the second, en- 

 tire or interrupted, a broader anterior baud on the third and fourth 

 segments, interrupted, and produced into a process posteriorly at the 

 inner ends ; in the interrupted spaces a slender longitudinal stripe; on. 



