6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



bridgelike, the part basad of it receding and convex, polished. Length 

 8-11 mm. 



Female — Very similar to the male; metallic reflections of head and 

 mesonotum more bluish; thoracic and abdominal tomentum and 

 pale pile yellowish rather than golden; abdominal ground color 

 entirely black or almost so. 



Color of eye in life. — Plain dark olive green. 



Distribution. — Dominica, Lesser Antilles. 



Holotype and allotype. — cf and 9, respectively, in copula, 

 Clarke Hall, June 12, 1966, G. Steyskal, type no. 69517, USNM. 



Paratypes. — 8cf cf, same but May 19 to June 2; 3 cf cf, same 

 but Mar. 12 and Apr. 11, 1964, H. Robinson; 1 9, same but Mar. 

 21-31, 1965, light trap, W. W. Wirth; 3 cf cf , same but Apr. 5 and 

 12, 1964, O. S. Flint, Jr. ; 1 cf , same but Mar. 3-13, 1965, H. E. Evans; 

 1 cf , near Clarke Hall, Mannett Gutter, May 1, 1964, Flint. 



Remarks. — The name"illucens" is doubly appropriate in describing 

 the translucent abdominal area and in indicating the superficial 

 resemblance to a small specimen of Hermetia Ulucens (Linnaeus). 



A comparison of the structure of the genitalia with that of Chryso- 

 chlorina (cf. Iide, 1966), particularly in respect to the interesting 

 development of the ninth sternum, leads to further confirmation of 

 the concept of the relationship of the two genera. Williston (1896) 

 states that he at first considered P. albitalus to belong to the genus 

 Chromatopoda; this genus likewise has a similar type of genitalia 

 and clearly is a chrysochlorine in this and other respects. 



Hermetia Ulucens (Linnaeus) 



Distribution. — Widespread, Old and New World tropics, sub- 

 tropics, and warmer temperate regions. 



I have the following records from Dominica: 9 99, 2 cf cf, Clarke 

 Hall, Dec. 1-6, 1964, P. J. Spangler, Jan. 18 to Mar. 11, 1965, J. F. G. 

 and Thelma Clarke, Feb. 10-17, 1965, H. E. Evans, Jan. 11-31, 1965, 

 malaise trap, W. W. Wirth, and June 1-2, 1966, G. Steyskal; 1 9, 

 South Chiltern, Dec. 8-10, 1964, Spangler; 2 cf cf, 1 9, Soufriere, 

 June 4, 1966, Steyskal. 



Brachycara slossonae (Johnson) 



Although there is no material of this species in the collection from 

 Dominica, there are 4 cf cf (St. Johns, Antigua, Feb. 2 to Mar. 14, 

 1965, H. E. Evans) taken on the Bredin-Archbold-Smithsonian 

 Expedition. This species was described from Florida and occurs in 

 the West Indies, as far south as Tobago. 



