410 Messrs. T. D. A. Cockerell and W. Porter on Bees. 



difFerence in the ornamentation of the abdomen make this 

 seem improbable. We wrote to Prof. Bruner for furtlier 

 information about E. dahotensis, and he replies : — " The 

 Entechma was represented in my collection by three female 

 specimens. The young man who collected these said that he 

 might have taken hundreds of them had he known that they 

 were of any particular value, since the bank was full of them." 

 Comparing E. grisella with the published accounts of En- 

 technia^ we thought it seemed generically distinct; but on 

 comparing specimens of the several species, we found them 

 structurally identical within generic limits. We find only 

 five joints to the maxillary palpi ; but the first joint, which 

 is very long, is slightly constricted at the middle, and on this 

 account was taken by Patton for two equal joints. The small 

 apical joints are constructed much as in Xeno(]lossodes. As 

 regards the mouth-parts Entechnia is to Xenoglossodes some- 

 wtiat as Eidenia is to Bomhus. 



Synhalonia, Patton. 



Ashmead says of typical Sgnhalonia, " abdomen in female 

 black, not fasciate." This would apply to 6'. atriventris 

 (Smith), which, however, is not mentioned by Patton in his 

 original account of the genus. The type of Synhalonia is 

 S.fulvitarsis (Cresson), which in the female has a more or 

 less distinct pale band on the second abdominal segment. 

 The differences in the venation between Synhalonia and 

 Eusynhalonia, Ashm., seem unsatisfactory, and at most of 

 specific value. In view of these facts it is probable that 

 Eusynhalonia cannot be maintained. 



Synhalonia crenulaticornis {Melissodes crenulaticoi'nisjGkW., 

 Ann. & Mag. Nat. Hist., Dec. 1898, p. 454) is peculiar in 

 having the first joint of the labial palpi relatively short, not 

 twice the length of the remaining three together, as it is in 

 S. /rater and atriventris. 



OxiEA, Klug. 



Mr. Ashmead has kindly sent us a male 0. fiavescens, 

 Klug, collected in April at Chapada, Brazil. We find the 

 maxillary palpi to be absent, as stated by authors ; and it 

 becomes clear that 0. gloriosa (Fox), which has 6-jointed 

 maxillary palpi, must fall in another genus, which we propose 

 to call Frotoxa'a. The two genera are separable thus : — 



(1) Apical plate of c? abdomen subtniu- 

 cate, with rounded corners ; tongue 

 short, broad at base, tilifonn ut apex, 



