DIPTEROUS VFAMILY FANTOPnTHALillDJE. 



59^ 



of Gamnsid mite, albeit in: sinall numbers, are present on the! 

 abdominal tergites ot at least two of the paratypes, as well as on 

 thotse of the liolotype of P. variegatus. 



Genus Rhaphiorliynchus Wiedemann. , . ;; 



Ithaphiorhynchths Wiedemann, Diptera Exotica, Pars i. p. 59 

 (1821). . 



In spite of the lapsie of more than a century since this genus 

 was first described, the genotype, Rhaphiorhynchus planiventris 

 Wied., is still the only species that can be assigned to it ; as 

 explained below (c/*. p. 597), it now seems more reasonable ta 

 found a distinct genus for Ithaphiorhynchus rothsohUdi Austen, 



' " Text-figure 10. 



■ Left inaxillary palpus oi Uliapliiorhynchus planiventris Wled. ; a, ^ ;,b, ?;' 

 Inner (ventral) aspect in each case. 



which was described in 1909. At the same time, the distinctive 

 ishape of the terminal segment of the palpus in lihaphioi'hynchua 

 planiventris, especially in the female, precludes any thought of 

 including this species in the genus Pantophthalmus. As shown, 

 in fig. 10, the distal segment of the palpus in Uhaphiorhynchus, 

 while distinctly swollen and fusiform in the male, is enormously 

 dilated in the opposite sex and, viewed from below, is decidedly 

 reuiform. A prominent and sharp-pointed facial beak, and a 

 Piioc.ZooL. 800.-1923, No. XXXIX. 39 



