428 PRiOCE'EMNGS OF THE NATIONAL MUSEUM vol.94 



Terminalia with the general form of trachelia but differing as 

 follows: Left tergal process (10 LP) (fig. 51) much shorter, base 

 scarcely as long as inner apical ''talon," outer apical spatulate por- 

 tion narrower; entire process gradually curving from base toward 

 left. The basal segment of the right cercus only half as long as 

 terminal segment (these segments are equal in trachelia). 



Fevfiale. — ^Unknown. 



Holotype. — Male, on slide, deposited in the Museum of Compara- 

 tive Zoology, from Villa Rica, Paraguay, December (F. Schade). 



Paratypes. — Four males from same locality and collector ; two col- 

 lected in December and two in October. Three are deposited in the 

 Museum of Comparative Zoology, one in the writer's collection. 



Remarks. — The form of the left tergal process as well as of the 

 head and other features is very constant in the above series. The 

 species is similar in appearance to trachelia but may be distinguished 

 by characters of the head (compare figs. 32 and 50) and by the shape 

 of 10 LP (compare figs. 37 and 51). 



It is possible that trachelia and schadci may occur in the same 

 region, as the specimen from Santiago del Estero, 10 km. from Lu- 

 gones, Argentina (the same state as the holotype of trachelki), illus- 

 trated by Davis (1940a, figs. 51-57), appears to be referable to 

 schadei and not to trachelia. 



PARARHAGADOCHIR CONFUSA, new species 



Figures 46-49 



This new name is proposed for specimens apparently erroneously 

 determined by Davis (1940a) as P. argentina (Navas). This species 

 is now referred to the genus Idioerribia of the Oligembiidae for rea- 

 sons given in the discussion of the species. Davis's misidentification 

 was probably due to the fact that his concept of the species was based 

 on specimens in the Paris Museum apparently incorrectly identified 

 as argentina by Navas himself. 



Male. — Color (holotype, on slide) : Head golden brown in fronto- 

 cl3'peal region, becoming medium brown caudally; antennae and palpi 

 dark brown ; mandibles straw yellow, tips and inner margins mahog- 

 any brown; submentnm amber yellow. Prothorax, pterothorax. legs, 

 wings, and terminalia medium brown. Length 11.0 mm. (on slide) ; 

 forewing length 6.0 mm., breadth 1.6 mm. 



Head (fig. 46) as figured, noticeably qundrate. Occipital foramen 

 equilaterally triangulate, angles rounded, the anterior one broadly so. 



Wings as throughout the genus; forewing with four R1-R2+3, one 

 R0+3-R.1, and two Rj+g-M cross veins. Hindwing with similar cross 

 veins. 



Hind basitarsi with two large sole-bladders. 



