60 MAINE AGRICULTURAL EXPERIMENT STATION. T912. 



e Males- hypopvgium with globose terminal appendages, 

 f. Brown species (Fig. 26). 3- vcnusta n. sp. 



ff. Thorax yellow with brown vittre. 7- tnccrta. 



ee. Females. 



f. Third antennal joints nearly three times as long as 

 broad; abdomen uniformly fuscous. 



3. vcnusta, var. a. 



ff. Third antennal joint less than twice as long as broad, 



or otherwise distinct. 



g. Pleura fuscous, S. D. 3- z'cnusta. 



gg Pleura largely yellow; hind margin of abdonunal 



tergites, yellow; Wyo. and B. C. 7- incertaf 



dd. Eastern species ; males. 



e Terminal lobes of hypopygium longer than basal seg- 

 ment. 4- difficilis n sp. 

 ee. Terminal lobes of hypopygium shorter than basal segment, 

 f. Hind femora tipped with brown; base of abdomen 

 largely yellow ; hypopygium with short broad forceps 

 (ptg. 28). 5 similis n. sp. 

 ff. Hind femora without conspicuous brown apices; 

 hypopygium with more elongate forceps (Fig. 29). 



6. rustica var. a. 



bb. Fore tarsal joints, 2-4, distinctly swollen beneath and broader 



than the metatarsus, apex of the latter enlarged ; f^emales. 



c. Western species; base of abdomen fuscous; Stanford Univ., 



P^j Phrop.ia sp. 



cc. Eastern species. 



d. Hind coxs yellow. 4, 5- difficilis, similis. 



dd. Hind coxa? fuscous. > 2. insulsa n. sp. 



I. Phronia producta n. sp. 

 Male. Length 2 mm. Head with antennne fuscous, the face, 

 palpi and scape reddish yellow; intermediate antennal joint, 

 about 1.5 times as long as wide. Thorax reddish yellow with 

 three subconfluent brown stripes; hairs pale, set?e black ;^ 4 

 scutellar set.-^. Abdomen yellow anteriorly with dorsal strip i 

 and posterior segments blackish; hypopygium (Fig. 24) dark. 

 Coxje and legs yellow, tips of hind femora and of tibi?e black- 

 ish ; tibial spurs and tarsi brown; fore metatarsus about 7-8 as 

 long as tibia. Wings (Fig. 152) hyaline, tinged with yellow; 

 haltercs yellow. Brookline, Mass. ( C.W.J. ). Aug. 



2. Phronia insitha n. sp. 

 Male. Length 2 mm. Head and antenna; fuscous, palpi and 

 scape yellow. Thorax brown, the humeri and pleura yellowish 

 brown ; hairs yellow ; setc-e brown to black, those of the scutel- 



