EMBIO'PTERA OF THE NEW WOiRL,D ROSS 



453 



HoloUjpe. — Apterous male, on slide, in Museum of Comparative 

 Zoology (type No. 1638). 



Type data. — Cuernavaca, Mexico, December 27, 1900 (W. M. 

 Wheeler), collected while excavating; a nest of Leptogenys loheeleri 

 Forel. 



This remarkable species is known only from the above type speci- 

 mens. Since it was collected in the ground, it may be assumed that the 

 species normally occurs under stones instead of in the bark of trees. 



Previous descriptions (Melander; Davis) have been based on this 

 specimen while preserved in alcohol. Since so many more details 

 are visible in a properly cleared specimen the type has been treated 

 in KOH and mounted on a slide. The writer is grateful to Prof. 

 Nathan Banks for this privilege. The following brief redescription 

 and the accompanying figures are based on the holotype mounted 

 on a slide. 



90 VJ 89 ^^ 91 



Figures 89-91. — Ckelicerca {Chelicerca) -uiheeleri (Melander), holotype male (Mexico): 89, 

 Head; 90, terminalia (dorsal); 91, terminalia (ventral). Explanation of symbols on 

 p. 403. 



Male (holotype, on slide) . — Dark brown throughout, prothorax, legs, 

 and terminalia somewhat darker, the head much darker; mandibles 

 golden, apices mahogany brown. Length 8.T5 mm. (after KOH 

 treatment). 



Head with outline as figured (fig. 89). Eyes small, facets without 

 pigmented interspaces; occipital foramen equilaterally triangulate, 

 sides slightly curved, anterior angle acute, slightly rounded; ventral 

 bridge broad, as wide as foramen length; submentum nearly twice 

 as wide as long, sides slightly curved, slightly sclerotized; mentum 

 represented by a narrow sclerite, broadly divided medially ; manibles 

 without apical teeth, stout, left mandible with a flange behind apex 

 which forms an obtuse tooth on inner mandibular margin, right man- 

 dible with inner margin evenly arcuate. 



