36 PHILIP p. CALVERT. 



slightly from base to apex, which is broad, aud excised from side to side; in the 

 middle of this excision there is usually a small tubercle, sometimes wanting. 

 Viewed from the side (fig. llj the appendage is dilated a little before the apex, 

 which is slightly curved upwards. 



Wings hyaline, veins brownish ; a very slight reddish brown tinge at base, apex 

 edged with brown, and a reddish brown cloud extending from the nodus, or a 

 little before it, half way or more to the pterostigma, aud from the costal margin 

 half way or more across the wing. In the younger individuals this cloud is 

 light yellow, sometimes almost absent. Pterostigma long, bright yellow, sur- 

 mounting one or two cellules. Membranule small, dusky ; 10-13 antecubitals on 

 anteriors, 7-8 on posteriors; 9-12 postcubitals. Usually three rows of discoidal 

 areolets on anteriors, two rows on posteriors. Discoidal triangle of anteriors 

 crossed by a single vein,* of posteriors free. Internal triangle of anteriors of 

 three cellules. No internal triangle on posteriors. No hypertrigonals.f One 

 basal postcostal cross-vein, placed nearer the base than the first antecubital. 



9 • — Differs from tlie % as follows : 



Vertex generally with a yellow spot above. Labium and labial palpi some- 

 times almost entirely light brown. A yellow spot on each side of the frons 

 aliove. Occiput often yellowish. Sometimes a short dark brown mark ou the 

 lateral sutures of the thorax. Appendages brown, as long as the last two seg- 

 ments, simple, straight, apex moderately acute; tubercle between them at their 

 bases, prominent, yellow. Vulvar lamina slightly notched in the middle. In .some 

 young females, the cloud on the middle of the wings is ouly distinctly represented 

 by a yellowish costal streak, extending from the fifth or sixth antecubital to the 

 seventh or eighth postcubital. (The same differences of color exist in females of 

 different ages as in the males). 



Measurements (in millimeters) : 



I 9 



Total length 46-53 46—56 



Abdomen (incl.app.) 32—37 33—40 



Appendages 2.25—2.5 2.5—3.25 



Anterior wing 37—42 36—44.5 



Posterior wing 35.5—39.5 35—42 



Pterostigma 4 — 4.5 4 — 5 



The above descrij)tion is based on eleven males, ten females from 

 Florida, and four males, ten females from Texas. Mr. E. M. Aaron 

 tells me that he has taken this species at Tarpon Springs and Ponto 

 Rasso, on the Gulf coast of Florida, and that the Texan s])eciniens 

 just referred to were taken by Mr. S. F. Aaron near Corpus Christi 

 and the Nueces Rivei-. 



L.eucorliiiiia llag;eiii n. sp. 



% ■ — Vertex metallic black, with a yellowish spot above. Frons, epistoma and 

 labrum cream-white. Frons with a median groove above, and a transverse black 



* In one wing only of two individuals there were two cross-veins. 

 ■ t One 9 h***! o'lt" hypertrigonal in both anteriors. 



