A REVIEW OF THE NEMATODES OF THE GENUS 

 HASTOSPICULUM, WITH DESCRIPTIONS OF TWO NEW 

 SPECIES 



By B. G. Chitwood 



Assistant Zoologist, Zoological Division, Bureau of Animal Industry, United 



States Department of Agi-iculture 



The genus Hastospiculum was proposed by Skrjabin (1923) for a 

 filarid {H. varani) found underneath the peritoneal lining of a 

 lizard {Varanus griseus). To this genus Yorke and Maplestone 

 (1926) added a second species {H. gouldi), from Varanus gouldi; 

 and Chandler (1929) added a third (H. spinigeimm) , from Varanus 

 favescens, and pointed out that Fila7'ia hipinnnta von Linstow prob- 

 ably also belongs to Hastospiculum. Baylis (1930) redescribed 

 Filaria macrophallos Parona as a member of this genus. 



In the present paper two new species of HastospiculuTn are de- 

 scribed. The first was collected by Dr. E. W. Price on October 14, 

 1929, from a python {Python reticulatus) , which died in the National 

 Zoological Park, and the second was taken by the writer from two 

 specimens of a boa {GonstHctor imperator) , which died in the same 

 park on January 19, 1931, and February 12, 1931, respectively. In 

 addition, E. spinigerum Chandler is herein redescribed, and brief 

 descriptions of the other species of the genus are brought together 

 into a form in which comparisons can be made. As Baylis points 

 out, some of the species may be synonyms, but until further informa- 

 tion can be obtained they must be regarded as valid species. 



HASTOSPICULUM SETIFERUM, new species 



Plate 1, Figukes 1-4 



Description. — Hastospiculum: The mouth opening is elongate 

 dorsoventrally and surrounded by a raised, thickened region of the 

 cuticle. A pair of blunt, lateral, liplike projections arise from the 

 outer surface of the cuticular elevation, each of which bears at its 

 base a single inward-projecting process. The external manifesta- 

 tions of the amphids, or so-called lateral papillae, are small round 

 pores around which the surface is perceptibly elevated. They are 



No. 29I9.-PROCEEDINGS U. S. NATIONAL MUSEUM, VOL. 80, ART. 19 

 93098—32 ] 



