CERIA. 



77 



sides of the metanotum, yellow. Scutellum yellow, with a black baud across the middle. Ahdomen 

 dark red, the hase of the second segment and the narrow hind margin of the second and third segments 

 yellow ; second segment cylindrical in front, broad behind ; fourth segment longer than the third. Legs 

 browmsh-red, the anterior tarsi more yeUow, the hind tarsi blackish ; hind femora much thickened, the 

 thickening greater on the basal half. Wings brown in front ; behiud, toward the base, yeilowish, 

 distally hyaline. 

 Length 14 millim. 



Hab. Mexico, Atoyac in Vera Cruz (II. II. Smith). 

 Two specimens. 



This species is allied to C. sackeni, Willist., from Brazil, but differs in the structure 

 of the antennae and abdomen, as well as in the markings. 



8. Ceria nigra. 



Sjjhyaimorpha nigra, Bigot, Ann. Soc. Ent. Fr. 1883, p. 317 '. 



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



9. Ceria pedicellata. 



Ceria pedicellata, Willist. Synopsis N.-Ara. Syrphidje, p. 261 \ 



Hab. Mexico, Jaral in Guanajuato (Schumann), Isthmus of Tehuantepec K 



A single male specimen from Jaral merely differs from the description of C. pedicellata, 

 Willist. (the type is not in my possession), in the lighter-coloured antennee, the first 

 two joints of wbich are yellow, ancl in the colour of the legs, which are yellow 

 and red throughout, instead of reddish-brown and black. The second joint of the 

 antennae, if anything, is longer than the first. The third and fourth segments of the 

 abdomen are subequal in length and both shorter than the second. The relationship 

 with C. saclceni is very marked, but a comparison with the type shows the following 

 specific differences : — The antenniferous process is slightly shorter, and the first joint of 

 the antennae is proportionately a little longer, as also the third joint. The mesonotum 

 in C. sackeni has a golden-pollinose, interrupted band, and yellow supra-alar vittulse, 

 wanting in the present species. The markings of the face are also distinctly different. 



10. Ceria bergrothi, sp. n., s . 



Antenna3 brownish-black, the third joint red ; first and second joints of nearly equal length ; antenniferous 

 process shorfc, about one-fourth the length of the first joint of the antennae. Pace and frontal triangle 

 shining black, the former wifch a lateral oblique stripe, the latter with two small spots, yellow. Thorax 

 wholly deep shining black, markedly roughened. Abdomen deep shining black, the second segment 

 yellow proximally at the sides ; second segment slender, its width posteriorly scarcely more than one-half 

 its length ; fchird and fourth segments of nearly equal length. Legs deep brownish-red, the tarsi some- 

 what yellowish. Wings deep brown in front, save at the distal part, where the colour is perceptibly 

 lighter ; nearly hyaline behind. 



Length 13 millim. 



Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 



One specimen. 



