i86 ENTOMOLOGICAL NEWS. [June, '03 



shorter than the proximal side, free in both front wings of one male, free 

 (right), crossed from proximal to distal side (left) in the second male. 

 Discoidal triangles of hind wings free (left) or crossed from anterior to 

 distal side (right) in one male, crossed on both sides in second male. In 

 the first mentioned male therefore only one of all the triangles is crossed, 

 namely on the right hind wing. Front wings with 13-14 antecubitals, 11 

 postcubitals ; hind wings with 9-1 1 antecubitals, 11-12 postcubitals. 



9 unknown. 



Dimensions. — Abdomen 35, hind wings 29, pterostigma of front wings 

 4,5, of hind wings 5, superior appendages 2 mm. 



Hab. — Chapada, Brazil, two males, probably by H. H. 

 Smith, one labelled December (sup. apps. lost), in the Museum 

 of Comparative Zoology, Cambridge, Mass. 



Differs from the described species D. angustipeyinis Selys and 

 D. semilibera Selys by the greater extent of pale coloring on 

 the abdomen and fewer postcubitals on the front wings ; from 

 semilibera also by its smaller size and apparently the shape of 

 the superior appendages. 



II. On EPIGOMPHUS. 



Epigomphus differs from Diaphlebia in the following re- 

 spects : 



All ivings : one basal subcostal cross-vein (gS.i^), arculus dis- 

 tal to the second antecubital at least of the subcostal series 

 (p(?.z), its sectors for a short distance beyond their origin sep- 

 arated by an interval less than the thickness of either sector 

 {100), more than one submedian cross- vein {sensu Selysii 1896) 

 {^6.2), proximal end- vein of pterostigma not prolonged to the 

 principal sector f {100). F?'ont ivings : first and sixth, seventh 

 or eighth antecubital thicker {92.J), proximal angle of the dis- 

 coidal triangle farther distally from the arculus than the length 

 of the proximal side of the internal triangle {80.8), 12-16 mar- 



* The figures in parentheses indicate the percentage of 26 individuals 

 examined in which the character existed as stated immediately preceding 

 each parenthesis. Thus, of the 104 wings of the 26 individuals, one wing 

 had no basal subcostal cross-vein, one wing had two such veins, leaving 

 102 wings or 98.1 % as stated above. 



t Occasionally a cross-vein does occur immediately below the prox- 

 imal posterior angle of the pterostigma, but even in such cases it is not in 

 prolongation of the proximal end-vein, nor is it thicker than its fellows. 



