70 



DIPTEEA. 



Hab. Mexico, Amula in Guerrero 6000 feet {II. H. Smith). 

 One specimen. 



This species is not a true Mallota, by reason of the form of the third antennal joint, 

 but I know not where else to place it. 



2. Mallota sackeni. 



Mallota posticata, Osten Sacken, Westeru Dipt., in Bull. U. S. Geol. & Geogr. Survey, iii. p. 338 1 

 (nec Fabr.). 



Mallota sackeni, Willist. Proc. Am. Phil. Soc. xx. p. 324 2 ; Synopsis N.-Am. Syrphidse, p. 204, 

 t. 8. fig. 14 \ 



Hab. United States, Washington 2 3 , California \ Texas 3 .— Mexjco, Jaral in Guana- 

 juato (Schumann). 



A single, injured, specimen. 



3. Mallota margarita, sp.n., e 2 . (Tab. II. figg. 7, 2; 7a, head; 7&, hind 



leg.) 



Deep black, with long and abundant, deep black pile, save on the terminal abdorainal segrnents, where it is 

 brigbt orange-red or light yellow. Eyes bare ; in the male narrowly separated below the ocelli. Pace 

 whitish-pollinose on the sides, shining black elsewhere. Antennae black, the third joint dark reddish- 

 brown ; arista red. Front of the female opaque black, shining below. Mesonotum, as seen through the 

 pile, shining in the middle behind. Abdomen opaque black, the black concealed by the pile ; the last 

 one or two segments with yellow- or orange-red pile ; hypopygium bare, large, subshining. Legs densely 

 black-pilose ; all the tarsi yellowish-red ; hind femora moderately thickened ; hind tibiae dilated. Wings 

 dark brown, subhyaline distally and along the narrow posterior border. 



Length 14-16 millim. 



Hab. Mexico, Xucumanatlan 7000 feet, Omilteme 8000 feet, both in Guerrero 

 {11. H Smith). 



Eight specimens. 



A very striking species, respectfully dedicated to Mrs. H. H. Smith, the indefatigable 

 companion of her husband in his travels. 



4. Mallota smithi, sp. n., $ . (Tab. II. figg. 8, $ ■ 8a,head ; 86, hindleg.) 



Thorax thickly fulvous-pilose ; abdomen shining red ; wings subhyaline, with a brown spot. Eyes bare, 

 in the male uarrowly separated below the ocelli. The triangles and the female front mostly opaque, 

 clothed with black pile. AntenntB black ; third joint and arista reddish-brown or brownish-red. Pace, 

 on the sides, thickly clothed with yellowish-white pollcn and pile ; in the middle, and the cheeks, shining 

 black. Thorax clothed thickly with long and abundant, rcddish-yellow pile, obscuring the opaque blaek 

 ground-colour ; scutellum similarly clothed, itself red. Abdomen shining red throughout, clothed with 

 short, yellowish-red and some black pile. Legs black ; middle femora at the base, the hind femora 

 largely, and a ring on the hind tibiae, sometimes red ; front and middle femora with long yellow pilo 

 behind, the hind femora with black and yellow pile ; hind femora considerably thickened ; hind tibiae curved 

 and dilated. Wings subhyaline, a large diffuse, brownish spot near the middle. 



Lcngth 10-12 millim. 



