318 PROCEEDINGS OF THE ACADEMY OF [May, 



from the types previously given by the author,^^ having the discoidal 

 field of the tegmina with quadrate maculations and the marginal 

 field largely ochraceous, the general appearance of the individual 

 suggesting certain species of the genus Scyllina. 



The range of this species extends from the Province of Mendoza 

 (Chacras de Coria) and Cordoba northward. 



* Staurorhectus glaucipes Rehn. 



1906. Staurorhectus glaucipes Rehn, Proc. Acad. Nat. Sci. Phila., 1906, 

 p. 34, figs. 9, 10. [Sapucay, Paraguay.] 



Misiones. December 12, 1910. (No. 4.) Four males. 



Bompland, Misiones. December 1, 1910. One male. 



These specimens have been compared with paratypic females. 

 We feel compelled to differ from Bruner^^ in placing this species in a 

 genus {Aynblysca'pheus) distinct from Staurorhectus longicornis, the 

 type of the latter genus. We have examined a considerable number 

 of specimens of the two species and find that the two characters given 

 as diagnostic of Amhlyscapheus are not in this case important enough 

 to be of generic value. These two are the "entire absence of 

 lateral carinse on the pronotum" and the "valves of the ovipositor 

 very blunt." The first character is one which is very strongly 

 approached if not absolutely reached in our series of longicornis, 

 while the second character, although constant, is of slight degree, 

 not worthy in the present case of generic value. The claim of the 

 genus Amhlyscapheus for recognition is, however, completely 

 destroyed by its author in the recent description of a species of the 

 genus Staurorhectus, S. inter medius,-^ which has as characters the 

 following: "lateral carinse of the pronotum almost obliterated on 

 the anterior lobe" and "valves of ovipositor similar to those of 

 Amhlyscapheus glaucipes Rehn (lineatus Bruner)." 



As the male was previously unknown, the following are its principal 

 differences from the opposite sex. 



Size small; form similar to that of the female. Head with the 

 eyes slightly more prominent than in the female, face more retreating 

 than in the other sex; interspace between the eyes distinctly narrower 

 than the width of one of the eyes; frontal costa with the margins 

 more subparallel and the sulcus deeper than in the female; antennae 

 as long as the caudal femur, slightly deplanate proximad. Tegmina 



26 Proc. Acad. Nat. Sci. Phila., 1906, pp. 33, 34. 



2^ Proc. U. S. Nat. Mus., XXX, p. 632. The species Amhlyscapheus lineatus 

 equals S. glaucipes as stated by us {Proc. Acad. Nat. Sci. Phila., 1907, p. 167) and 

 later admitted by Bruner (Ann. Carneg. Mus., VIII, p. 31). 



^Ann. Carneg. Mus., VIII, p. 31. 



