222 DIPTERA 
Under side of middle femora more extensively setose, middle 
tibiae not deformed and as long as basal two joints of their : 
tarsi; sixth segment of abdomen not densely setose . . . . . . . 5. . . . . 2. 
2. Sette of middle femora particularly conspicuous along the 
middle, middle tibi densely setulose within; dorsal prong 
of pygidium with black velvety knob at middle and bluntly 
tong-shaped tip- —.. ... 5. . 7... c3 e POERIPORBECEA, BOYL OS CEN 
Sete of middle femora evenly distributed, middle tibiz scarcely 
setulose; dorsal prong of pygidium withoutvelvety knob. . . . . . . . . . . . 3 
3. Seta» of middle femora distant, about eight in number; dorsal 
prong of pygidium jet black, quadrate at base and then 
suddenly narrowed, distally ribbon-like, preapical valve split 
at apex, apical valve strap-shaped, side valve iun and setose 
behind... 55 ad : «Oh LI eo e ro URL MISTULLTOB, BOV S5. (A. 
Setz of middle femora vide: Abodk PER in number; side valve : 
not setose, preapical valvé pointed .... . . . 2 etu ur AS LT á 
4. Six to eight dorsocentrals, four scutellars; side valve subshining, 
rounded quadrate ... . . . . . . ... «. — « ». P. MONOGRANNA, hoy. wp. (3); 
the discal cell, slightly infumated, a very faint stigma, sections of the fourth vein proportioned 1.1: 0.8: 1:2. of the Anh 
vein equal, posterior crossvein not very oblique; hairs of the calypteres white, 
Female. Seven dorsocentrals. Tarsi not lengthened, only a little longer than their tibizs, no basal bristles on the - 
femora, tibize simple, unarmed except that the middle ones have two extensor and one apical small setulze, Seventh segment 
of the abdomen with ciliate margin. : 
One specimen of each sex, received from Professor Aldrich, who collected them at Woodside, California, 
April 25, 1909. 
(1) Proclinopyga exporrecta, nov. sp. — Male. Length 3mm. Heavily dusted with blackish brown above, 
dark gray on sides, Facets uniform, About eight dorsocentrals, four scutellars, metapleural setulae black, Abdomen setose, 
the basal and ventral hairs pale, sixth segment with long setz ; epipygium stout, the dorsocentral prongs deformed, loosely 
long-ciliate in front, swollen and black-velvety at middle and curved and bluntly tong-like at tip, apical valves large spoon- 
shaped and densely hairy beneath, side valves triangular, setose behind, penis shaped like a long stalked open?-mark 
Lower side of middle femora with a group of six long stout bristles near the middle and with a row of pale flexor setze which 
form a short fringe before the knee, hind femora with about eight extensor and seventeen flexor outstanding setze, middle 
tibiz finely setulose within more pronounced at tip, middle tarsi not abnormally lengthened, the metatarsus about two- 
thirds as long as the tibia. Stalk of halteres brown ; calypteres and fringe yellow. 
Type, Saltese, Montana, August 22, 1916 (Melander). A female from the Gallatin Ranger Station of Yellowstone 
National Park, July 28, 1923 (Melander) offers no distinctive characters — Its last abdominal segment is compressed and 
shiny. 
(2) Proclinopyga fistulator, nov. sp. (Pl. 8, Fig. 75). — Male. Length 3 mm. Heavily dusted with 
blackish brown above, dark gray on sides, Lower facets very slightly larger than upper. About eight dorsocentral, 
acrostichals long, four scutellars, metapleural setulze black. Abdominal hairs not long except on sixth segment, those at 
base and on venter pale; epipygium stout, dorsal prongs wide at base then suddenly narrowed to the curled ribbon-like end 
which is ciliate within at tip, preapical valves narrow chitinzed and excavated at tip to suggest an opposing thumb and 
forefinger, apical valves narrow chitinzed and loosely hairy, side valves quadrangular and setose behind, penis tubular 
rectangularly bent at basal third, erect over middle third and slightly curved on apical third., Middle femora with a long 
pale flexor seta at base, the black flexor setz sparse and inconspicuous, hind femora with about four flexor and eight 
extensor short setze along basal half, tibize and tarsi normal. Stalk of halteres brown; calypteres and fringe yellow. 
Holotype, Megantic, Quebec, 18 July, 1923 (Curran), deposited in Canadian National Museum. 
(3) Proclinopyga monogramma, nov. sp. — Male, Length 2.2 mm, Piceous black, the lower pleurae and 
coxie somewhat cinereous. Lower facets a little enlarged. Eight dorsocentrals, four scutellars, acrostichals long, three to 
six black metapleural setule, Abdomen coarsely black-hairy, the bristles of the sixth segment not pronounced, epipygium 
relatively small, compressed, subshining, lateral valves not setose, triangular, the inner corner connected with its mate by. 
an arched chitinous bridge, dorsal process straight, preapical process long and rod-shaped, apical valve small, narrowly 
