Manchester Memoirs, Vol. xlii. (1898), No. 11. 77 



(Generic Arrangement of the Bees allied to Melissodes and 

 Anthophora. Bull. U.S. Geol. Siirv. Territ., v., p. 471) gives 

 also five joints for Tetralonia, but it is not clear to me if he 

 has himself examined the genus or gives a quotation from 

 Latreille. Melissodes Latr. is described in full by Patton 

 (/.r., p. 472) ; it has, like our species, 4-jointed maxillary 

 palpi, " the fourth joint often minute," which does not 

 conform to our Indian species any more than does his 

 description of the first joint of the labial palpi being twice 

 the length of the second. In other respects our species do 

 not quite fit into Patton's diagnosis. Further, they do 

 not agree with each other in the form of the palpi. For 

 those species with 6-jointed maxillary palpi, Patton estab- 

 lished (/.<:., p. 473) the genus Synhalonia, representing 

 Macrocera Lep., Tetralonia Sm., and Melissodes Cresson, 

 nee Latr. ; but it can hardly be regarded as generically 

 identical with our species. Taschenberg {BerL Entoin. 

 Zeits., xxvii., p. J^') groups the genera under Macrocera 

 (an inadmissible name, being preoccupied in Diptera)\ 

 Melissodes Latr. with 4-jointed maxillary palpi; Macroceia 

 sen. str. with them 5 -jointed ; Xenoglossa Sm. with them 

 also 5 -jointed ; Synhalonia with them 6-jointed and 

 Ancyloscelis, of which the palpal characters are not given, 

 but which is treated by Smith {Cat. Hym., ii., p. 365) as a 

 doubtful synonym of Tetrapedia Klug, a very different 

 genus from Tetralonia. As Mr. Rothney's 9 differs in 

 many respects from Mr. Wroughton's male and from the 

 described genera, I give a generic description of it here, 

 leaving it for further investigation to decide whether the 

 points of difference in the palpal and other characters are 

 of generic, sub-generic, or of mere specific importance. 



9. Antenna; shorter than the thorax ; ocelli .*. Man- 

 dibles without teeth. Tongue not elongate, if anything 

 shorter than the palpi ; the apex ending in a button ; 

 paraglosscc a little longer than the tongue ; densely pilose ; 



