564 PROCEEDINGS OF THE NATIONAL MUSEUM VoL, 113 
With the consent of Dr. Laffoon, the type has been deposited in 
the collection of the U.S. National Museum (USNM 65444). 
DistrizutTion.—The single male specimen was collected by Dr. 
Laffoon at Lake Itasca, Clearwater County, Minn., 3 Sept. 1950. 
Genus Morpholeria Garrett 
Morpholeria Garrett, 1921, p. 127—Czerny, 1924, p. 111; 1927b, p. 36.— 
Collin, 1943, p. 245. 
Comments concerning the separation of Morpholeria from related 
genera will be found under the discussions of Spanoparea and 
Acantholeria. 
Morpholeria tristis (Loew) 
FicureE 61 
Blepharoptera tristis Loew, 1862a, p. 225 (Centuria 2, 84). 
Morpholeria melaneura Garrett, 1921, p. 127.—Czerny, 1924, p. 112. 
Morpholeria tristis (Loew), Czerny, 1924, p. 111. 
Mate.—Front reddish orange to yellow; fronto-orbital plates, 
ocellar triangle, vertex, and back of head cinereous; face and cheeks 
dirty yellow; antennae brown, darker distally; arista dark brown to 
black, minutely pubescent (may appear bare); arista less than 3 
times the length of third antennal segment; anterior fronto-orbital 
bristle about one-half the length of the posterior bristle; oral vibrissae 
moderately strong, a single row of buccal setae; cheek-eye ratio 
from 0.34 to 0.45. 
Thorax uniformly ash gray to black, with brownish spots at bases 
of dorsocentrals; sometimes evidence of a brownish median vitta on 
mesonotum; dorsocentrals 1+-3; prescutellar bristles weak; scattered 
setae on mesonotum form 3 irregular rows between dorsocentrals; 
scutellum bare, except for 2 pairs of lateral bristles; mesopleuron with 
several setae in anterior corner behind the propleural bristle; sterno- 
pleuron with a strong bristle in upper hind corner and setae anterior 
to it, and sometimes a few setae forming a line down the middle to 
the long hairs between the coxae; remainder of pleura bare; no pro- 
sternal bristles. 
Legs grayish brown to black; middle tibiae with 3 or 4 strong 
ventral apical bristles, with shorter bristles between these. 
Wings hyaline with no distinct infuscations. 
Abdomen grayish brown to black; sparsely scattered setae; seg- 
ments 2-5 with bristles along posterior margins, mostly laterally; 
terminalia dark brown to black. 
FrmMaLe.—Sinilar to male, except for terminalia. 
Lenetu.—2.5-3.5 mm. 
Distripution.—Alaska, British Columbia, Alberta, Saskatchewan, 
Manitoba; February—October. 
