76 



DIPTEEA. 



an elongate black spot, leaving the yellow in the shape of a V or U ; a small black spot above the root of 

 the wings, and in the bottom of the suture ; between the black stripes the yellow is opaque : pectus, 

 sutures, aud metanotum shining black, the latter covered with dense yellow pollen. Abdomen slender, 

 black ; first segment yellow on the sides ; second segment with the base and the broad posterior margin 

 yellow ; third and fourth segments with a broad, biarcuate, narrowly intcrrupted, median band, and the 

 broad hind margin, and the remainder of the abdomen wholly. yellow ; fourth segment a Kttle longer 

 than the third. Legs light yellow, the femora with black streaks ; hind femora considerably thickened. 

 Wings brownish in front, nearly hyaline behind. 

 Length 14 millim. 



Hab. Panama, David (Champion). 



One specimen. One of the handsomest species of the genus. 



4. Ceria signifera. 



Ceria signifera, Loew, Neue Beitrage, i. p. 18 1 ; Willist. Synopsis N.-Am. Syrphidse, p. 262 2 . 

 Hab. United States, Texas 2 , Elorida 2 .— Mexico K 



5. Ceria meadei, sp. n., 6 . (Tab. II. ngg. 12, 6; 12 a, head in profile ; 12 b, 

 head from in front.) 



Frontal triangle and face shining black ; a narrow stripe on either side of the middle, running to the oral 

 margin, a small spot near the orbits, and the narrow orbital margins of the frontal triangle, yellow. 

 Antenniferous process about one-half tho length of the first joint of the antennse, in colour obscure 

 reddish-yellow. Antennse black, the third joint narrowly red at the base ; second and third joints of 

 about equal length, both shorter than the first ; style slender, silvery. Thorax subopaque, black : 

 mcsonottmi scrobiculate ; humeri with a small or minute yellow spot ; the sutures very narrowly golden- 

 pollinose. Abdomen short, stout, the second segment only moderately narrowed in front ; fourth segment 

 distinctly shorter than the third ; second segment with a slender yellow hind margin ; third and fourth 

 segments with a broad yellow hind margin, the third, before the yellow band, with a biarcuate golden- 

 pollinose band, the fourth with a broad golden-pollinose band, leaving the black as a slender anterior 

 raargin, and a slendor band behind ; hypopygium yellow. Legs black, the knees very narrowly yellow ; 

 hind femora but little thickened. Wings brown in front, hyaline behind. 



Length 10-12 millim. 



Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 

 Three specimens. 



6. Ceria scutellata. 



Ceria scutellata, Willist. Synopsis N.-Am. Syrpkidse, p. 265 \ 

 Hab. Mexico, Isthmus of Tehuantepec h 



7. Ceria schnablei, sp. n., <j . 



Face and cheeks ferruginous-red ; an oblique stripe on either side running to the oral margin, the cheeks 

 behind, and the orbital margins of the frontal triangle, yellow. Antenniferous process fully half as long 

 as the first antennal joint, red. Pirst joint of the antenna) reddish-black, but little longer than tho 

 UBcond ; second joint red, black at the base ; third joint red, not more than half as long as the second. 

 Thorax deep red ; mesonotum finely roughened ; a stripe on either side from the suture nearly to the 

 scuteUum, two small oblique spots in front of the scutellum and one on the humeri, yellow ; on the 

 inner side of the vittuke, a black space. Pleuras with two slender vertical stripes and a large spot on the 



