584 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 113 
This species is best distinguished by the structure of the male ter- 
minalia. My interpretation of the species is based on Kuropean 
specimens (8 males and 2 females) determined by Czerny and others. 
I have not observed any similar specimens from North America, and 
it appears likely that previous records of this species are incorrect. 
MALE AND FEMALE.—Front orange, ocellar triangle, vertex, and upper 
half of back of head with dark gray pollinosity, third antennal seg- 
ment yellow to brownish, aristae dark brown, remainder of head yel- 
low; anterior fronto-orbital bristles about one-half the height of the 
posterior bristle; a single row of buccal setae; cheek-eye ratio about 
0.55. 
Thorax bluish gray, humeri and scutellum concolorous with the 
remainder of the mesonotum; dorsocentral bristles all about equally 
strong; mesopleuron with several setae in anterior corner, otherwise 
bare; sternopleuron with a single bristle in upper hind corner; middle 
of the sternopleuron covered with several rows of hairs extending 
ventrally to between the coxae; legs yellow to yellowish orange; wings 
entirely hyaline; abdomen usually with first 3% or 4 segments dark 
bluish gray, the remaining segments yellowish orange. 
Leneru.—5.0-7.0 mm. 
Ameoebaleria scutellata Garrett 
FIGURE 82 
Amoebaleria scutellata Garrett, 1921, p. 125.—Czerny, 1924, p. 133. 
This species is known only from a holotype male and a metatype 
male in the Garrett collection. I have examined these specimens. 
Because the species is very similar to others in the genus, the structure 
of the male terminalia is of great importance in distinguishing it. 
In the illustration I have tried to interpret the appearance of the 
terminalia as viewed from the left side of the insect. All of Garrett’s 
terminalia preparations are mounted on slides and it is not always 
possible to see them in the desired position. 
Mate.—Front yellowish orange anteriorly, becoming rusty toward 
the vertex; ocellar triangle and upper back of head dark gray; arista 
dark brown or black; remainder of head yellowish orange; anterior 
fronto-orbital bristle 4 to %4 the height of the posterior bristle; buccal 
setae irregular, so that they appear in more than a single row. 
Thorax dark gray (specimen is “wet” and coloration is difficult to 
interpret); mesonotum with thin brown median vitta, and dorso- 
centrals arising from brown spots; upper part of pleura may be brown- 
ish; all dorsocentral bristles about equally strong; scutellum concolor- 
ous with remainder of mesonotum; remainder of thorax as in A. caesia 
