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U.S. NATIONAL MUSEUM BULLETIN 261 



29. Genus CATORTHORRHINUS Powler 



Figure 131 

 Catorthonhinus Fowler, 1898a:213. Type-species: C. resimus Fowler (1898a:213), 

 by monotypy. 



Length of male 1 2 mm. 



Head as in Ichthyobelus, but with apical process narrower, sulcate 

 dorsally, and directed more dorsad, in lateral aspect almost forming 

 a right angle with surface of disc, with each ocellus about equidistant 

 between adjacent anterior angle of eye and midline of crown. 



Thorax as in Ichthyobelus, but with dorsopleural carinae obsolete 

 and with transverse striae of scutellum obscure. Forewing as in 

 Ichthyobelus, with bases of third and fourth apical cells in same trans- 

 verse line. Hindwing extending almost as far posteriorly as apex 

 of forewing; vein R2+3 incomplete. Hindlegs as in Ichthyobelus, with 

 femoral setal formula 2:1:0. 



Male genitalia: Pygofer with an undifferentially sclerotized projection 

 on dorsal margin, posterior margin rounded, posterior half of disc 

 with numerous dispersed microsetae, without processes. Plates fused 

 basally, extending posteriorly beyond pygofer apex, each with numerous 

 microsetae and a number of macrosetae on disc, without setae near 



Figure 131. — Catorthonhinus resimus Fowler, specimen from Portrerillos, 



Panama. 



