430 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i09 



basal and hind tibia with apical, narrow whitish rings; hind tibial 

 comb with four (n= 10) spines, the longest one next to the spur. 



Wing. — Pattern as figured ; poststigmatic pale spot in cell R5 only 

 rarely incompletely divided into two separate spots, these located at 

 same distance from base of wing, the spot never extending caudad as 

 far as vein Mi; pale spot in apex of cell R5 large and rounded, usually 

 filling most of the space between anterior wing margin and vein Mn 

 two pale spots in cell Mj, only one pale spot each in apices of cell AI2 

 and anal cell, pale spots present lying in front of mediocubital fork 

 and behind medial fork. Macrotrichia very sparse in extreme apices 

 of cells Us, Ml and M2; costa extending to 0.65 of wing length, wing 

 broader than usual on distal half. Halter whitish. 



Abdomen. — Dark brown, cerci yellowish. Spermatheca one, pyri- 

 form, measuring 0.059 by 0.038 mm., with long sclerotized duct. 



Male genitalia: Ninth sternum with very shallow, broad, caudo- 

 median excavation; the posterior membrane bare; ninth tergum 

 short, the apex distinctly notched in middle with prominent, tri- 

 angular, apicolateral processes. Basistyle with short ventral and 

 dorsal roots, the posterior heel not developed on ventral root; disti- 

 style slender, only slightly curved. Aedeagus with broad, distally 

 rounded, basal arch, the basal arms distinctly curved; distal stem 

 broad at base with a pair of hyaline, sublateral, rounded lobes, the 

 median point slender and rounded at tip. Parameres each with 

 large basal knob, stem slender and gradually curved on basal portion, 

 more swollen toward apex of straight portion, ventral lobe absent, 

 apex abruptly tapered to simple filiform tip directed ventrad. 



Distribution: Panama; Honduras; Nicaragua; Trinidad. 



Panama records: 



BocAS DEL ToRO PROVINCE: Almiraiite (type locality). 

 Canal Zone: Camp Butler, Mojinga Swamp. 



Discussion: In general appearance, size, and wing markings 

 glabellus is practically identical with leoni Barbosa and gabaldoni 

 Ortiz. There are two spermathecae, however, in gabaldoni, and 

 leoni differs in having an antennal ratio of only 0.75 and sensoria 

 present on segment vii as well as on iii, viii-x. All three species 

 have the remarkable repetition of increasing lengths of segments in 

 the antennal series with segment xi always shorter than x. The 

 male genitalia of glabellus can be readily distinguished by the gradually 

 curving base of the paramere, the stem swollen at the distal part of 

 the straight portion, beyond which the paramere tapers rapidly to 

 a simple, filamentous tip. 



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