Eutrichota duplicata (Malloch 1918)

Pegomyia fuscicauda Huckett
Pegomyia fuscicauda Huckett, Trans. Amer. Ent. Soc, lxv, p. 31, 1939.
The species fuscicauda has the habitus of chrysida, of which it might well be considered a darker form. The two species differ notably in the color of antennae and hypopygium. The second antennal segment in fuscicauda is extensively infuscated and the reddish tinge on third segment is limited to basal regions or entirely masked, whereas in chrysida the second antennal and proximal region of third segment are bright yellow. In the male of fuscicauda the hypopygial sclerites are distinctly blackish and lustrous in contrast to the opaque grayish color of abdomen, whereas in chrysida these sclerites are grayish pruinescent and tend to conform to the color of the adjoining parts of the abdomen.
In such allied forms as setiformis and frigida the hypopygium is similarly black and shining, but fuscicauda may be distinguished from the former in both sexes by the absence of a robust bristle at apex of posterodorsal surface of fore and hind tibiae, and by the absence of a weak bristle at middle of anteroventral surface of mid tibia; from frigida by the absence of a bristle on distal half of anteroventral surface of mid femur. In the female of these three species the third and fourth fore tarsal segments are broadened.
It is evident from the large series of specimens examined that those taken in California are considerably paler than those from Oregon, Washington and Alberta. In the latter form the parafrontals and mesonotum may be extensively brownish pruinescent and mid and hind femora considerably darkened. In occasional specimens the apical posterodorsal bristle of fore tibia may exhibit some degree of development, and in the female this bristle may become quite robust.
Alberta: i d Edmonton, June 10 1937, (E. H. Strickland), [Univ. Alberta].
California: i di 9, Falls, Forest Home, San Bernardino County, November 4 1934, (A. J. Basinger), type and allotype, [A. N. S. P.]. 1 9, Forest Home, November 10 1925, (M. W. Stone); 2 d Mount Home Canyon, San Bernardino Mts., June 8 1924, (J. M. Aldrich), [U. S. N. M.]. 1 d Mount Wilson, August 4 1915; 1 9, Fallen Leaf, 6500 ft. alt., July 16 1917, (J. M. Aldrich), [U. S. N. M.]. . 1 9, Gold Lake Camp, Plumas County, July 20 1916; 1 9, Giant Forest, Sequoia National Park, August 22 1917, (R. C. Shannon), [H. C. H.].
Colorado: 2 9, Lake City, 8700 ft. alt., August 8-15 1936, (C. L. Fluke), [Univ. Wise.].
Idaho: i d Waha, May 30 1924, (A. L. Melander), [A. L. M.].
Oregon: i 9 , Hood River, (Childs) ; 1 9 , Three Sisters, Scott Lake, 4650 ft. alt., August 8 1926, (H. A. Scullen), [Ore. State Col.].
Washington: 2 cf, i 9, Electron, May 7 1925, (A. L. Melander), paratypes, [A. L. M.]. 1 d 1 , Mount Rainier, White River, July 20 1924; 1 9, Mount Baker, Skyline Trail, August 10 1925, (A. L. Melander), [A. L. M.]. 1 9, Longmire Spring, August 29 1925; 2 9, Mount Rainier, Yakima Park, July 25 1932; 1 d 1 9 , Mount Rainier, Shadow Lake, July 31 1932, 6200 ft. alt. ; 1 9 , Mount Rainier, White River Camp, August 10 1934, (J. Wilcox), [J. Wilcox].

Pegomyia setiformis Huckett
Pegomyia setiformis Huckett, Trans. Amer. Ent. Soc, lxv, p. 32, 1939.
The species setiformis is undoubtedly closely allied to the coastal and southern form fuscicauda. Because of the tendency for some of the differentiating characters to vary in fuscicauda there may be difficulties in distinguishing the two species if too much credence is placed in the key for this purpose. However in setiformis all the specimens before me possess a robust apical posterodorsal bristle on hind tibia and a weak mid anteroventral bristle on mid tibia, whereas in all specimens of fuscicauda that I have seen the former character is weakly developed and the latter is not present. The males of setiformis and fuscicauda may be distinguished from those of such related forms as duplicata and longimana (Pokorny) by the black subshining hypopygial sclerites which contrast sharply with the pale tergal pruinescence, and by the addition of accessory bristles on basal sclerite of hypopygium in addition to those that encircle the puckered area on the dorsocentral plane. In duplicata and longimana the hypopygium is grayish pruinescent and concolorous with abdominal terga and there are no additional bristles on basal sclerite beside the single semicircular series bordering the puckered area.
In the female of setiformis and fuscicauda the second, third and fourth fore tarsal segments are broadened, whereas in duplicata and longimana these segments are uniformly slender as in mid tarsus.
Alberta: i d 1 9 , Waterton, July 12 1923, (H. L. Seamans), type and allotype; 1 9, Banff, July 17 1922, (C. B. D. Garrett); 1 9, Moraine Lake, August 4 1923, (J. McDunnough), [C. N. C.].
British Columbia: i 9, Kamloops, May 23 1923, (E. R. Buckell), [C. N. C.].
Idaho: i d, Potlatch, May 28 1930, [H. C. H.].
Washington: i 9, Pullman, May 13 1923, (A. L. Melander), [A. L. M.].
Wyoming: i , Yellowstone Park, Crescent Hill, July 5 1923, (A. L. Melander),

Eutrichota duplicata adolah langau dari famili Anthomyiidae. Spesies ko juo marupokan bagian dari ordo Diptera, kelas Insecta, filum Arthropoda, dan kingdom Animalia.

Istilah "Anthomyiidae", nan baarati "langau bungo", barasal dari kato Yunani anthos, "bungo", dan myia, "langau".

Eutrichota duplicata este o specie de muște din genul Eutrichota, familia Anthomyiidae. A fost descrisă pentru prima dată de Malloch în anul 1918. Conform Catalogue of Life specia Eutrichota duplicata nu are subspecii cunoscute.