6o MAINE AGRICULTURAL EXPERIMENT STATION. I912. 



e. Males ; hypopygium with globose terminal appendages, 

 f. Brown species (Fig. 26). 3. venusta n. sp. 



f£. Thorax yellow with brown vittas. 7. incerta. 



ee. Females. 



f. Third antennal joints nearly three times as long as 

 broad; abdomen uniformly fuscous. 



3. vemtsta, var. a. 



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



or otherwise distinct. 



g. Pleura fuscous, S. D. 3. vemtsta. 



. gg. Pleura largely yellow ; hind margin of abdominal 



tergites, yellow; Wyo. and B. C, 7. incerta? 



dd. Eastern species ; males. 



e. Terminal lobes of hypopygium longer than basal seg- 

 ment. 4. difficilis n. sp. 

 ee. Terminal lobes of h5rpopygium shorter than basal segment, 

 f. Hind femora tipped with brown ; base of abdomen 

 largely yellow ; hypopygium with short broad forceps 

 (Fig. 28). S similis n. sp. 

 ff. Hind femora without conspicuous brown apices; 

 hypopygium with more elongate forceps (Fig. 29). 



6. rusHca var. a. 



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



than the metatarsus, apex of the latter enlarged ; females. 



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



Cal. Fhronia sp. 



cc. Eastern species. 



d. Hind coxae yellow. 4, 5. difficilis, similis. 



dd. Hind coxje fuscous. 2. insulsa n. sp. 



I. Phronia producta n. sp. 

 Male. Length 2 mm. Head with antenn?ev fuscous, the face, 

 palpi and scape reddish yellow ; intermediate antennal joints 

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

 three subconfluent brown stripes; hairs pale, setae black; 4 

 scutellar setae. Abdomen yellow anteriorly with dorsal stripe 

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

 Coxse and legs yellow, tips of hind femora and of tibiae black- 

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

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

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



2. Phronia insuha n. sp. 

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

 scape yellow. Thorax brown, the humeri and pleura yellowish 

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



