62 MAINi; AGRICn.TURAL ]i;xPF:RniEXT STATION. I9T2. 



Female. Similar to the male in coloring but the abdomen 

 is largely brown, the anterior margin of each sclerite and the 

 anterior portion of the venter yellow. The tip of the metatar- 

 sus and joints 2-4 of the fore tarsi swollen beneath. Ithaca, 

 N. Y 



5. Phronia s'lmilis n. sp. 



Alale. Length 2.5 mm. Coloring as in the preceding species 

 (P. difficilis) excepting that the pleura are brown, light brown 

 in one specimen, darker in another, and that the dark triangle= 

 of the abdomen are larger. Hypopygium (Fig. 28) black, the 

 appendages shorter than the basal sclerite. Wing, Fig. 156. 

 Ithaca. N. Y. Sept. 2 specimens. The hypopygium resembles 

 that of P. Tacsanowskyi Dzd. 



It is barely possible that the females described under P. 

 difficilis belong here. 



6. Plironia rustic a AVinnertz. 

 \>rh. Zool.-bot. Ges. Wien. XIII. 875. 1863. 



]Male and female. Length 3-3.3 mm. Head brown, 3 or 4 

 basal joints of antennae, and 23alpi yellow; antennae of male 

 about 1.5 times, of female about as long as head and thorax 

 anited. Thorax brown, with ashy reflection, in teneral speci- 

 mens the pleura are yellow ; set^e brownish. Abdomen brown 

 with appressed pale hairs ; hypcp3'gium large, yellow, some- 

 times darker apically. Coxje and legs yellow, tarsi brown ; fore 

 metatarsus at least as long as the tibia. A\^ing brownish hya- 

 line; halteres yellow. "Greenland." 



\'ar. a. Differs in structure of the hypopygium (Fig. 29) 

 Ithaca, X. Y. Aug. 



7. Plironia inccrta Adams. 

 Wash. Carnegie Inst. 67. 37. 1907. (Alycetophila). 

 ]\Iale. Length 4 mm. Head dark brown, mouth parts and 

 basal joints of antennae yellow. Thorax obscure yellow; mes- 

 onotum with 2 A'-shaped figures, one set within the other, 

 resulting in fusion of the two lateral stripes posteriorly and 

 Avith the median one betAveen them being divided anteriorly. 

 Scutellum and metanotum brown, former with an apical pair 

 of bristles, mesonotum with short yellow pile laterally and 



