8 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
HAEMATOPOTA AMERICANA Osten Sacken 
(Higs as As) 
Haematopota americana Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4, 
No. 1): 395-396, 1875; Williston, Kans. Acad. Sci. Trans. 10: 135, 1887; 
Hine, Ohio. at. 5: 231-234, 1904; Johnson, Psyche 19: 182, 1912; Cameron, 
Bull. Ent. Research 17: 25-26, 1926; Philip, Minn. Agr. Expt. Sta. Tech. 
Bull. 80: 96, 1931. 
Medium sized; apical pale band of wing narrow and not reaching posterior 
margin ; haltere yellow; fore tibia not greatly swollen. 
Female——Length 9-11 mm. Eye with short pile. Frons gray, considerably 
suffused with brown to each side of a slender, median, gray line at vertex, 
with black hair at vertex and long white hair just above basal callus; a 
subquadrate, velvety-black spot close to, but not touching, angle formed by basal 
callus and eye, and a small black fleck midway between vertex and basal eallus 
on median line; distance between eyes at upper angles slightly greater than 
distance from vertex to top of subcallus and about three-fourths width of basal 
FIGURE 1.—Antenna and wing of (A) ap eiea ion obe americana, (B) H. punctulata, and 
(C) . rara, 
callus; basal callus about five times as wide as median height where the dorsal 
margin is slightly concave: subcallus yellowish, with a median, velvety, dark- 
brown spot. Antenna black, the extreme base of third segment orange brown; 
first segment swollen, one and one-half times to nearly twice as long as thick, 
with no dorsal excision near apex, the basal half with thin gray pollen, apical 
half shiny; second very small, with a heavy fringe of black hair; third with 
basal portion nearly twice as long as wide and apical portion slightly longer than 
width of basal portion. Clypeus and genae light gray, the upper genae with 
small black spots not touching frontal callus and only slightly, if at all, con- 
fluent near top of spotted area. Second palpal segment very short and stout, 
cream colored, with concolorous hair. Proboscis only a little longer than palpus. 
Mesosecutum dark brown, with three slender gray stripes and also a broader 
gray stripe from humeral lobe to base of wing; pleura, sternum, and coxae gray, 
with white hair. Wing pale brownish, with grayish-white maculations; two 
rosettes distinguishable, one around fureation and one just below and behind 
it; apical pale band slender and not reaching posterior margin; stump from 
base of vein R: MHaltere pale yellow. Femora gray; tibiae brownish black, 
with basal third of first tibia yellowish and a basal and a subapical yellow band 
on each of the others; tarsi dark brownish black, the first segment of each mid- 
dle and hind tarsus mostly yellow. 
Abdomen dark brown above, hind margins of tergites narrowly gray, very 
small median triangles on tergites 2-5, and round, isolated, sublateral, gray 
