440 R. OSTEN SACKEN 



I venture to describe it because it will be easily recognizable and 

 represents a peculiar type , very different from the typical 

 Graptomyzae. 



Eristaiis chalcopygus Wied. Auss. Zw. IL 178 (Manilla). 

 Two (/, two 9; Amboina 1873 (Beccari). 



Syn. -Ajxona volixcelloid.es Walk. J. P. Lin. Soc VII, 213 ! (Mysol). 

 Eristaiis maxima Dolescli. 2 Bijdr. 29, Tab, X, f. 4! (Amboina). 



Axona may be a good genus, but requires a closer definition 

 than that of Walker's. 



Eristaiis suavissimus Wk. J. Pr. Lin. Soc. IH, 95 (Aru). 



Two 9, Fly River, N. Guin. Dec. 1875 (L. M. D'Alhertis). 



Recognizable ; E. placens Wk. (Mysol) also agrees , except 

 legs. 1 do not find anything about these species in my notes 

 taken in the Br. Mus. 



Eristaiis splendens Le Guillou, Rev. Zool. 1842, p. 314-316; 

 Macq. D. E. II, 2, 49 (Islds. Salomon). 



Syn. E. cupreofasciatus v. d. Wulp, Tijdschr. v. Ent. 1868, 114 (Amboina). 

 E. metallicus Dol. 2 Bijdr. 30, Tab. X, f. 6 (Amboina). 



46 9 , 15 (/ from Amboina (Beccari, 1873), Hatam, N. Guin. 

 (id. June 1875), Varbusi, Ansus (id. April 1875); Awek, Jobi 

 (Coll Bruijn). Some of the females , chiefly among those from 

 New-Guinea have the velvet-black crossband on the third segment 

 narrower and not angular in front ; the same is the case with 

 the crossband on the fourth segment. 



Eristaiis arvorum (Fab.) Wied. Auss. Zw. II, 184! (Java, China). 

 Two 9, Kandari, Celebes, April 1874 {Beccari). 



Eristaiis quinquestriatus (Fab.) Wied. Auss. Zw. II , 188 ! 

 (East-Indies). 



Two c/", one 9 ; Buitenzorg, Java 1875 (Ferrari). 



The description is not clear in some particulars ; but the type, 

 which I saw in Vienna agrees with my specimen. 



