SYNOPSIS OF NORTH AMERICAN SYRPHID^. 201 



Two specimens ( $ and 2 ) in Baron Osten Sacken's collection at the 

 Museum of Comparative Zoology, bearing the label "Dallas, Tex., 

 Boll.," and a specimen in Professor Eiley's collection. 



MALLOTA.* 



Mallota Meigen, Syst. Beschr., iii, 377, 1822. 



Head somewhat flattened, broader than the thorax. Face concave 

 below antennae and with a large obtuse tubercle ; antennae short, third 

 joint broader than long, arista bare. Eyes in the male contiguous or 

 separated only by a sutural space; pilose or naked. Scutellum large. 

 Abdomen short, much convex above. Legs strong, hind femora ex- 

 traordinarily thickened and bent, the hind tibiae sometimes with a stout 

 spur in the middle in front in the male. Wings with the marginal cell 

 open; third longitudinal vein deeply bent into the first posterior cell; 

 the fourth vein terminates near the tip of the third; anterior cross-vein 

 oblique, situated near the middle of discal cell. Large, black, shining 

 species, densely pilose. 



TABLE OF SPECIES. 



1. — Eyes pilose ; more or less of the base of the abdomen with yellow pile, 



posticata 



Eyes bare ; abdomen wholly black pilose 2 



2. — Eyes of male separated by a narrow suture in front of the ocelli; wings with a 



distinct brown spot Sackeni 



Eyes of male quite contiguous; wings indistinctly, or not at all spotted. Hind 

 tibiae of the male with a stout spur in the middle (form Bautias), or wholly 

 without snch spur cimbiciformia 



MaUota posticata. (Plate VIII, fig. 13.) 



Eristalis posticatus Fabricius, Syst. Antl.,237,21 ; Wiedemann, Auss. Zw. Ins., 



ii, 194, 62 (translation from Fabricius). 

 Milesia barda Say, .1. Acad. Phil., vi, 163 ; Compl. Wr., ii, 357 (male, not female). 

 Eristalis coactus Wiedemann, Auss. Zw. Ins., ii, 165. 

 Imatisma posticata Macquart, Dipt. Exot., ii, 2, 68 (male, not female). 

 Merodon Balanus Walker, List, etc., iii, 600. 

 Merodon hardus Packard, Guide Study Ins., 399, fig. 319; Amer. Nat., ii, Jan., 1869, 



593; pi. 12, figs. 10, 10a; Glover, MS. notes Jour. Dipt., 1874, p. 32; pl.,viii, 



fig. 30. 

 Mallota barda Osten Sacken, Cat. Dipt, 135, 249. 

 Mallota lyosticata Williston, Berl. Ent. Zeit., xxvii, 170 ; Lintner, First An. Rep., 



211, fig. 64. 



Habitat. — New England, Canada, New York, Kansas!, Indiana (Say). 



5 , $ . Length, 11 to 15""". Eyes pilose, contiguous in the male for a 

 little longer distance than in M. cimhiciformis. Face black, with light 

 yellowish- white dust and pile, median stripe and cheeks shining ; frontal 

 triangle clothed with the same dust as the face, except just below the 

 base of the antennae, where it is shining, pile yellowish or blackish ; 

 vertex black, with black pile. Front in female clothed with black pile, 

 more or less intermixed with yellow ; pile of occiput yellow, blackish 



*Ma/l/lwT6f, woolly. 



