Osteology and Classi/icati'on of the Order Apohs. 377 



Lep., a North- American species, as the type. Kohl's indi- 

 cation can hai'dly be accepted as fixing the type, as he 

 mentions two species, C. vagus, Linn., and C. dives, H.-Sch., 

 as examples of the group. It would certainly have been 

 more convenient ii: Ashmead had followed Kohl and selected 

 C. vagus as the type of So/enius. The valuable Avork done 

 by American authors in revision of nomenclature is unfor- 

 tunately sometimes disfigured by inconvenient changes which 

 might easily have been avoided. C. vagus and the allied 

 eastern forms dift'er from Ashmead's definition of Sulenius in 

 not having the abdominal segments constricted and strongly 

 punctured, and eventually may have to be separated. Pio- 

 visionally the following species may be placed in Sulenius, 

 being allied to C. vagus, most of them having been described 

 as Crabro without any definite indication of the subgenus 

 to which they belong. In nearly all the specimens I have 

 examined the mandibles are closed, and I have often been 

 unable to distinguish clearly the tooth on the inner margin 

 near the base. 



Asiatic Species. 

 Crabro (Solenius) agycus, Cam. 

 Crabro agycus, Cam. Entomologist, p. 261 (1904). 



Crabro {Soleniics) palitans, Biugh. 

 Crahro palitans, Bingh. Proc. Zool. Soc. p. 446 (1896). 



Crabro {Solenius) alacer, Bingh. 

 Crabro alacer, Bingh. Proc. Zool. Soc. p. 443 (139G). 



XLIX. — The Osteology and Classification of the Ttleostean 

 Fishes of the Order Apodes. By C. Tate Regan, M.A. , 



(Published by permission of the Trustees of the British Museum,) 



Order APODES, 



Malacopterous physostoraes with the pelvic fins, when 

 present, abdominal. Body elongate, cylindrical, or com- 

 pressed ; scales vestigial or absent ; gill-openings restricted ; 

 dorsal and anal fins contiguous to or continuous with the 

 reduced caudal, when this is present; pectoral fins small and 



Ann. & Mac,. K Hist. Ser. 8. Vol. x. 2G 



