8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



The black coloration on the hind legs is less intense and, particularly 

 on the femur, less extensive, but usually developed only subbasally. 

 Two females have this coloration as in the males ; two males have the 

 hind femur and tibia almost wholly yellow. 



The continental form has the frons of the female wider, usually 

 0.17-0.18 the head width, less densely punctured, and with the 

 glabrous stripe adjacent to the eye on the upper frons and vertex 

 wider, usually widest opposite the posterior ocellus and distinctly 

 wider than the transverse diameter of the ocellus; the median glabrous 

 area anterior to the anterior ocellus is more than one-third the width 

 of the frons; the pile of the ocellar triangle and vertex and sometimes 

 entire frons is yellow, and the yellow area on the second tergum is 

 conspicuous. As indicated above, however, all of these characters 

 except the last are variable in both the continental and island forms, 

 though constant for the Dominican series except as indicated above. 



The North American and Cuban Sargus lucens Loew (=S. clavis 

 Wilhston, —S. tricolor Loew) fits also into this same complex. We 

 may be dealing here with a single polytypic species. 



Distribution. — Throughout the Lesser and Greater Antilles, and 

 most of the tropical American mainland. 



I have the following records from Dominica: 14 99, 8 cf cf , Clarke 

 Hall, Jan. 24 to Feb. 28, 1964, H. Robinson; Nov. 19-30, 1964, P. J. 

 Spangler; Sept. 1, 1965, J. F. G. Clarke; Jan. 21 to Mar. 10, 1965, 

 light trap, W. W. Wirth; Feb. 20-28, 1965, H. E. Evans; June 6-11, 

 1966, G. Steyskal; 1 cf , near Clarke Hall, Mannett Gutter, July 1, 

 1964, O. S. Flint, Jr.; 1 9, South Chiltern, Feb. 20, 1965, Wirth; 

 2 99, Pont CassS, Oct. 12-14, 1964, Spangler; and 5 miles south of 

 Pont Casse, Apr. 11, 1964, Flint. The last two specimens represent 

 the pale-legged form. 



Merosargus eunomus, new species 



Figures 3, 6, 9, 10 



Close to M. opaliger Lindner but readily distinguishable from that 

 species by the black spot on the mesopleuron; also, among other 

 differences, in M. opaliger the median frontal vitta is much broader, 

 the abdominal spots on the third and fourth terga are not so discrete, 

 the three stripes forming the presutural extension of the quadrate 

 mesonotal area are brownish, not metallic, and the setose processes 

 of the ninth sternum of the male are not developed. In my key to 

 Merosargus (James, 1941, pp. 305-6) M. eunomus runs to couplet 27 

 but, because of the metallic markings of the mesonotum, will not 

 fit either alternative. 



Male. — Frons, vertex, and occiput black; frontal callus white, 

 area between this and antennae, also face, pale yellow. Frons about 



