EEISTALIS. 



59 



posterior opaque band; remainder of the abdomen shining. Legs black; the immediate tip of all the 

 femora, tip of hind tibiae, four anterior tibiao, and aU the tarsi light yellow ; hind femora slender. Wings 

 brownish. 

 Length 12-13 millim. 



Hab. Mexico, Sierra de las Aguas Escondidas in Guerrero 9000 feet (H. H. Smith). 

 One specimen. 



2. Eristalis circe, sp. MS. (Tab. II. figg. 3, <j ; 3 a, head.) 



Male. Pace and frontal triangle shining black, the former sometimes somewhat reddish upon the sides ; clothed 

 with long and abundant yellow pile. First two joints of the antennaj blackish ; third joint reddish-yeUow ; 

 arista (for an Eristalis) markedly plumose. Eyes densely and long, light reddish-yellow, pilose. Meso- 

 notum opaque dark ochraceous, clothed with abundant light reddish-yellow pile. Scutellum yellowish-rod, 

 with similarly-coloured pile. Pleurae shining black, in the middle thickly clothed with yeUow pile! 

 Abdomen bright yeUowish-red, with loDg and abundant yellowish-red pUe; flrst segment, a large 

 triangular or triradiate spot on the second, and a smaU one on the third segment, black. Wings tinged 

 with yeUow. Legs black ; four anterior tibiaj, for the larger basal part, the base of the hind femora, and 

 the four anterior tarsi more or less, yellow ; hind femora moderately thickened. 



Female. Front opaque browuish, with long reddish-yellow pile. PUe of thorax shorter. Abdomen shining 

 black, with very short, not abundant, black pile, except in the middle of the second segment, where it is 

 longer and reddish-yellow ; second, third, and fourth segments each with a narrow, successiyely more 

 broadly intorrupted, opaque, black band ; anterior margin of the second segment also opaque black. Pile 

 of the legs less abundant, and whoUy black ; hind femora not thickened. 



Length 12-13 mUlim. 



Hab. Mexico, Ciudad in Durango (Forrer), Omilteme in Guerrero 8000 feet (H. H. 

 Smith), Jalapa (F. B. Godman). 



Twenty specimens. 



3. Eristalis obsoletus. 



Eristalis obsoletus, Wiedem. Aussereur. zweifl. Ins. ii. p. 175 1 ; Sehiner, Reise der Novara, Diptera, 



p. 261 2 ; Willist. Trans. Am. Ent. Soc. xv. p. 279 3 . 

 Eristalis testaceicornis, Macq. Dipt. Exot. 4° Suppl. p. 138 4 . 

 Eristalis thoracica, Jaennicke, Neue exot. Dipt., in Abh. Senck. Ges. vi. p. 399 \ 



Hab. Mexico 4 5 , Omilteme 8000 feet, Chilpancingo 4600 feet, Amula 6000 feet, 

 Hacienda de la Imagen 4000 feet, Xucumanatlan 7000 feet, Acapulco, all in Guerrero, 

 Cuernavaca, Vera Cruz, Atoyac (H. H. Smith), Jalapa (F. D. Godman), Temax in 

 Northern Yucatan (Gaumer). — South Ameeica 2 , Brazil 1 3 . 



Twenty-five specimens. 



There is some variation in the colour of the legs, and the spots of the second 

 abdominal segments may be decidedly yellow. I have compared the Mexican examples 

 with others from Brazil, so that there can be no question of the identity. Except that 

 Bigot seems to know this species, I should be much in doubt from his description of 

 E. pachypoda as to whether he meant it for this or the following. 



