1890] MARYLAND ACADEMY OF SCIENCES. 87 



One specimen from Mr. Coqiiillett, captured near Los An- 

 geles, is the only one that I have seen. This is, however, so 

 distinct from all the others thus far recognized that I venture 

 to depart from my usual practice with regard to describing 

 species from a single specimen. The opportunity to examine 

 specimens of the male is awaited with much expectancy. 



2. M. tristis. New sp. 



More elongated than the foregoing species ; the color above 

 is a dull pale blackish slate, minutely grayish pubescent, the 

 underside and head shining black. Head long and narrow, 

 polished, vertex convex, and together with the face bald, 

 clothed with grayish pubescence on the clypeus and cheeks ; 

 antennae black, thick, long, the second joint evenly thick 

 throughout, a little shorter than the two following conjoined, the 

 third and fourth of about equal thickness, but the third fully 

 twice as long as the fourth; rostrum slender, long, reaching to 

 near the apex of the venter. Pronotum dull slate black, sub- 

 campanuliform, covered with grayish pubescence, the anterior 

 lobe narrow, convex, separated from the posterior one by a 

 deeply impressed line, the callosities jet black, polished, pos- 

 terior margin sinuated, leaving the base of scutellum widely 

 exposed. Legs long, dull piceous black. Scutellum moder- 

 ately convex, minutely pubescent, with the basal portion 

 marked off from the disk by a deeply impressed curved line, 

 and near each basal angle is a minute yellowish spot. Corium 

 moderately flat, not distinctly punctate, covered with minute 

 grayish pubescence, the membrane fuliginous, somewhat irides- 

 cent, with the vein and basal and inner margins of the cuneus, 

 particularly at tip, ivory-white. 



Length to end of abdomen, 3| millims ; to tip of membrane, 

 4 millims ; width of pronotum at base, 1 millim. This gloomy- 

 looking species appears to be common in the southern part of 

 California, but especially in the vicinity of Los Angeles. 

 From this last named locality several specimens have been sent 

 to me by Mr. D. W. Coquillett, who has done more than any 

 other entomologist to disclose the peculiarities of the fauna of 

 Southern California. This species bears a close resemblance to 



