— 1 16 — 



third submarginal cell, near apex ofanl :rior branch of this vein, an I ol vein between 

 first and second, and second and third posterior cells, also a large one on veins at 

 bases of first, second and third po lorioi cells. 



Length 5 mm. Cal. A single female, in May. 



This species will doubt! :ss require the formation of a new genus on 

 account of the peculiar structure of the scutellum, but until the described 

 species of Lordotus become more numerous than at present, this species 

 may remain in the latter genus, with which it agrees in all other impor 

 tant characters. 



2. Lordotus gibbus Lw. (Cent. IV, 53; syn. Adelidea flava Jaen. (Neue 

 Exot. Dipt., 39.) 



Length 7 to 10 mm. Col., N. M., Cal., Mex. 

 A single female from New Mexico. 



3. Lordotus planus (J. S. (West. Dipt. 258.) 

 Length 7 to 9 mm. Cal. 5 rjVJ and 4 9 9, m May. 



4. Lordotus miscellus n. sp. 



Wholly black. Front of female grayish pollinose and yellowish white pilose ; face 

 white pilose ; first two joints of antennae short, yellowish and black pilose above, 

 longer white pilose below ; first antennal joint about two-thirds as long as the third, 

 second joint about once and a fourth as long as wide, third joint longer than the first 

 two taken together. Occiput white tomentose and pilose. Thorax yellowish tomen- 

 tose and pilose in middle of dorsum, elsewhere the tomentum and pile is white: 

 pleura, breast and coxae white pilose. Scutellum white tomentose and white or yel- 

 lowish pilose. Abdomen shining ; a white tomentose cross-band at base of each 

 segment ; pile white, that on dorsum of the second, third and fourth segments in tin- 

 female, and also on the fifth and sixth segments in the male, largely black or blackish : 

 venter wholly white pilose in the female, that on the fifth and sixth segments in the 

 male largely black. Legs densely white tomentose; first joint of tarsi usually white 

 tomentose. Wings pure hyaline, costal cell yellowish. 



Length 5 to 8 mm. Cal. 5 <$$ and 699, in Sept. 



5. Lordotus zona n. sp. 



Differs from miscellus as follows : First joint of the antenna; about three-fourths 

 as long as the third, second joint about once and a half as long as wide, the third 

 joint about as long as the first two taken together. Abdomen destitute of white 

 tomentose cross-bands, black pile confined to the fourth and fifth segment-, most 

 abundant on the fourth. Apex of each ventral segment reddish. Legs wholly yel- 

 lowish, not very densely tomentose. Base of first tarsal joint reddish, this joint 

 1 ely tomentose. Costal, first basal, and basal two-thirds of marginal cell, 

 yellowish. 



length 10 to 12 mm. Cal. 3 rftj 1 , in Sept. 



6. Lordotus apicula n. sp. 



I tillers from miscellus in having the pile of the front in the female largely, of the 

 antennae, lace, palpi, pleura, breast, coxae and legs wholly black; (pile and tomen- 

 tum of thorax, scutellum and abdomen largely rubbed off in my specimen). 



Length 8 mm. Col. A single female (Morrison). 



