392 TJie Ohio Naturalist. [Vol. VI, No. 1, 



posterior cells. The crossband reaches the posterior margin of 

 the wing filling out the apex of the anal cell and all the fourth 

 and fifth posterior cells with the exception of a small patch at 

 the distal end of the latter; the outer margin of the crossband 

 starts from the union of the first vein with the costa and extends 

 in a somewhat irregular curve to the end of the vein which 

 separates the third and fourth posterior cells. The apical spot 

 fills out the apexes of the marginal and first submarginal cells 

 and invades the second submarginal, reaching the posterior 

 border of the wing at the apex of the vein which separates the 

 latter cell from the first posterior. All the femora black at each 

 end, otherwise yellow, tibia black, all of them quite distinctly 

 enlarged, but the anterior pair more than the others; anterior 

 tarsi black, others with the first segment wholly yellow and 

 remaining segments with apexes more or less black. First seg- 

 ment of the abdomen above narrowly yellow on the sides, second 

 segment yellow for its entire width on each side but this color 

 narrows toward the front border until at the mid-dorsum where 

 the two meet it is very narrow ; a niid-dorsal yellow marking on 

 the second and third segments, widened and triangular on the 

 second and elongate and narrow on the third ; the posterior third 

 of the fourth segment yellow; venter with first two segments 

 yellow, remainder black. 



Type taken at Santa Lucia, on the Pacific slope of Guatemala 

 at an altitude of about a thousand feet, February 1, 1905. 



Chrysops calopterus, n. sp. Female with black body and 

 variegated wings. Length, G millimeters. 



Face and palpi yellow, antenna yellow, except the annulated 

 portion of the third segment which is black; region of the ocelli 

 shining black, frontal callosity yellowish on the disk and black 

 al)ove, otherwise front covered with gray pollen. Thorax black 

 with indications of stripes on the anterior part ; legs black except 

 a broad ring on the distal part of each femur and basal segments 

 of each tarsus which are yellow. Anterior fourth of each basal 

 cell, entire costal cell and marginal cell to beyond the stigma are 

 infuscated. The black of the crossband and apical spot are 

 much l)roken u]) and the hyaline triangle is crossed and 

 encroached upon ])y dark markings; there is a very dark quad- 

 rangular s])ot at the furcation of the third vein; the discal cell 

 is hyaline with an irrcgluar dark ])atch at its middle; the pos- 

 terior margin of the wing is infuscated all the way to the fifth 

 posterior cell and more pronounced at the intersection of the 

 veins; the veins at the inner ends of the discal, first, fourth and 

 fifth posterior cells are widely margined with black. None of the 

 cells of the wing except the costal are entireh- infuscated, and 

 none are entirely hyaline excei)t the axillary. Abdomen black 



