— ii6— 



tliird submaii^iiial cell, near ajicx of ant -rior iM-anch of this vein, and of vein between 

 first and second, and second and third posterior cells, also a larj^e one on veins at 

 bases of first, second and third posterior cells. 



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



This species will doubtless require the formation of a new genus on 

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

 species oi 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 Jlava Jaen. (Neue 

 Exot. Dipt., 39.) 



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



A single female from New Mexico. 



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

 Length 7 to 9 mm. Cal. 5 r^ r^ and 4 9 9' '" May. 



4. Lordotus miscellus n. pp. 



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

 white pilose ; first two joints of antennre short, yelloAvish 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 ths fir>t 

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

 tose and pilose in middle of dorsum, elsewhere the toaientum and pile is wliite ; 

 pleura, breast and coxse 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 s.'cond, third and fourth segments in the 

 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 anil 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. 



Difters from iniscellus as follows : First joint of the antennae 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 segments, 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 

 not densely tomentose. Costal, first basal, and basal two-thirds of marginal cell, 

 yellowish. 



Length 10 to 12 mm. Cal. 3 cTcJ', in Sept. 



6. Lordotus apicula n. sp. 



DifTers from miscellus in having the pile of the front in the female largely, of the 

 antcnnre, face, palpi, pleura, breast, coxae and legs wholly black ; (pile and lomen" 

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



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



