NORTH AMKRICAN DIPTKRA. 179 



middle of costal cell, base of marginal cell and middle of first basal cell pale 

 yellowish ; a large hyaline spot on veins at bases of first sulimarginal. first, third 

 . and fourth posterior and of the discal cell. Length 8-16 mm. 



California ! Twenty-two specimens. 



Var. ]>alli<la n. var.— Differs from the typical nugntor only in having no 

 black pile on sides of abdomen nor black tomentum on venter, brown of wings 

 paler, not near reaching apex of discal cell, its outline not distinct, and costal 

 cell wholly yellowish. Length 8-13 mm. 



California!, Arizona! Nineteen specimen.*. 



44. Aiitlira.^ pertlisa Loew.— " Eelated to Anthrax fenestrala Fall., third 

 joint of antenna conical, pile and tomentum of body largely white or whitish ; 

 wings hyaline, with two blackish brown crossbauds a little abbreviated posteri- 

 orly, the basal one quite broad and subequal, the other much dilated anteriorly 

 and enclosing a hyaline .spot. Length of the body 4 J lines (:= 9 mm.) ; of the 

 wings, 4i lines. 



" Head black, face and anterior third of front clay yellowish ; front and face 

 white tomentose, front black pilose, anterior oral margin short black pilose; pro- 

 boscis not prominent; first two joints of antennte obscure clay yellowish, black 

 pilose, the third black and coitical. Thorax black, opake, tomentum and pile 

 whitish, near the collar somewhat yellowish ; scutellum red, the base black. 

 Abdomen black, a large brick-red spot on each side, apex and venter claj' yel- 

 lowish ; margins of abdomen white pilose, posterior angles of third segment and 

 whole of segments five and six, black pilose. Legs yellowish brick-red, tarsi 

 bla('k. Halteres white. Wings hyaline, with two blacki.sh -brown crossbands; 

 the first subbasal, quite broad and of an equal width, extending from costa to 

 the posterior angle, but not quite reaching hind margin of wing; anterior half of 

 second crossband much dilated, enclosing a hyaline spot iu which are situated 

 the small cro.ssvein and base of anterior branch of the third vein, posterior half 

 of this crossband narrow, curving through the discal, third and fourth posterior 

 cells; costal cell and base of wing tinged with subfuscous. New Mexico. [Dipt. 

 Amer. sept, indigena, Cent, octava, p. 18. "J 



Unknown to me ; the above is a translation of Loew's orioinal 

 description. 



45. Antlirax inira n. sp. — Front black, yellowish tomentose and black 

 pilose; face reddish, but little projecting below, yellowish tomeutose ; proboscis 

 not projecting beyond the epi.stoma ; first two joints of antennae reddish, first 

 joint about three times as long as the second, third joint black, short conical at 

 its base; occiput yellowish tomentose. Thorax black, yellowish tomentose and 

 pilose, pile on middle and hind part of dorsum black ; bristles on hind angles of 

 thorax reddish ; pleura yellowish pilose; scutellum black, yellowislt tomentose, 

 bristles reddish or black. Abdomen reddish, a black triangular stripe extends 

 from the base to the fifth segment, sometimes extending whole length of abdo- 

 men ; tomentum of abdomen yellowish, that on apex of fourth segment broadly 

 black, usually extending wholly across the segment in the middle of dorsum ; 

 pile on sides of first two segments abundant, white; that on sides of remaining 

 segments sparse and yellowish, sometimes largely black ; dorsum of abdomen 

 spar.se black pilose ; venter reddish, base and central part sometimes black, 

 whiti.sh tomentose; Legs reddish, tarsi, hind tibiie and tips of other tibise .some- 

 times black; tomentum of legs yellowish, front tUmv. destitute of bi-istlos, claws 

 of front tarsi minute. Wings tinged with smoky brown fi-om base to bases of 



