340 The Ohio Naturalist. [Vol. XIV, No. 8, 



Volucella scutellata Bigot. Mostly plain black, front and face 

 pale, scutelluni brown with stout spinifcrous tubercles. Alany 

 of the veins adjacent to the costal border of the basal jjart of the 

 wing margined with brown. Length lo mm. Santiago, Otiillota 

 and \'arious other localities in Chile. 



Volucella tympanitis Fabricus. A rather small pale species 

 with the abdomen banded with brown. Wing hyaline with a 

 brown spot at stigma and another near the apex. Volucella 

 ardua Wiedemann seems to be a synonym. True Wiedemann 

 recognizes both as valid species in the same publication but the 

 descriptions read so near alike that I cannot make the distinction. 

 Length 9 mm. A specimen from Bartica, British Guiana and one 

 from Santa Lucia, Guatemala. 



Phalacromyia Rondani. 



Phalacromyia nigrifrons n. sp. A small dark colored species. 

 Thorax, including the scutcllum, shining purple, abdomen brown, 

 front black, face yellow. Length G mm. 



Face much produced forwaid but not so much downward, 

 yellow without black markings, antenna yellow, proboscis near 

 the length of the front femora; front shining black, the color 

 changing at the insertion of the antennae producing a pronounced 

 contrast with the yellow of the face. Thorax shining purple, 

 scutellum of the same color as the thorax and v/ith a distinct im- 

 pression just before its apex. Legs all dark brown with the 

 exception of the posterior tibiae which are pale. Wings very pale 

 yellowish, costal border more intense, a dark brown point at 

 stigma. Abdomen dark ycllowirh brown, slightly darker at the 

 incisures. 



The tvpe female taken at Bartica, British Guiana, Ma\^ 28, 

 1901, by H. S. Parish. 



Phalacromyia virescens Williston. A pale green species with 

 yellowish wings. Anterior part of the thorax yellowish, a small 

 dark spot in front of the scutellum and another in the trans\'erse 

 impression just l^eforc its apex. Front pale green, face yellow. 

 A female specimen from Bella Vista Yungas, Bolivia. 



The locality is some distance from where Williston's type was 

 procured but the specimen answers the description in detail. 



Eristalts Latreille. 



Eristalis aemulus Williston. Five specimens from Bartica, 

 British Guiana. Williston has reported the species from Mexico and 

 Central America. 



Eristalis albifrons Wiedemann. Wo ha\-c the sj^ecics from 

 Louisana, Yucatan and Guatemala. 



Eristalis assimilis Macquart. Numerous examples of both 

 sexes from Arequii)a and Puno, Peni. 



