Nov., 1905.] New Species North American Chrysops. 39 ^ 



NEW SPECIES OF NORTH AMERICAN CHRYSOPS. 



Jas. S. Hix&. 



Of the four species described in this paper three were taken in 

 Guatemala. The other one is from eastern United States and is 

 described at this time for the reason that a student of the group 

 desires to mention the species in a paper he is preparing for 

 pubhcation. The Guatemalan material was |3rocured in com- 

 pany with Mr. E. B. Williamson of Bluffton, Indiana. 



Chrysops melanopterus, n. sp. Female, black, first two seg- 

 ments of the antenna each longer than the third. Length, 9 

 millimeters. 



Relative length of the antennal segments 2:1.5:1. Basal seg- 

 ment without indication of enlargement as is the case with other 

 species of the genus having the first and second antennal seg- 

 ments elongated. AA^hole body, including wings, legs and 

 antennae, black. 



Type taken at a point about five miles vip the railroad from 

 Puerto Barrios, Guatemala, Department of Izabal, March 14, 

 1905. The locality was along the railroad where it passed 

 through an extensive swamp only a few feet above sea level. 



Two other specimens were procured at the same place, one 

 from the back platform of a freight caboose. The specimen 

 followed the moving train for some time before it was captured. 



The species is entirely distinct from any species I have seen 

 or have found described. The uniform black wings are peculiar 

 for a member of this genus. 



Chrysops pachycnemius, n. sp. Female wing with costal 

 margin and crossband black, apical spot separated from the 

 crossband; abdomen yellow at the base, black apically. Length, 

 8 millimeters. 



Lower part of the front, including the frontal callosity, and 

 the face yellow; palpi a shade darker than the face, proboscis 

 black. Region of the ocehi shining black, otherwise the upper 

 part of the front covered with bright yellow pollen. First seg- 

 ment of the antenna yellow, second yellow on the inner side, 

 l)rown outside, third black. Thorax shining black with four 

 dorsal stripes formed by yellow pollen, the two inner abbreviated 

 behind, the two outer broken at the transverse suture; side of 

 the thorax with a yellow spot behind the eye, one directly 

 beneath the root of the wing and another just behind it. Wing 

 with the base, costal cell and the crossband black, apical spot 

 separated from the crossband by a wide space, extreme base of 

 each costal cell black, the inner margin of the crossband extends 

 from the branching of the second and third veins nearly straight 

 to the anal vein passing near the inner end of the discal and fifth 



