NEW RECORDS OF BEES. 235 



clypeus, and the middle of the first ventral abdominal segment 

 being covered with white hair which slants backwards, whereas 

 in the Anthophora this region has only a transverse band of erect 

 hair. 



Synhalonia calif ornica (Cresson). 



This was described as a Melissodes. From the description I 

 thought it must be a Synhalonia, and Mr. Viereck has kindly 

 examined Cresson's type and finds this to be the case. It seems 

 allied to S. nevadcnsis, but is a trifle larger, the pubescence is 

 paler, the clypeus is yellow (yellowish white in nevadensis), and 

 the basal joint of posterior tarsi has an apical tooth. This 

 refers to the male, the only sex known. S. californica, Fowler, 

 needs a new name, unless it is the female of S. edwardsii. 



Centris bicolorella, n. n. 

 Centris smithii, Friese, Termetz. Fiiz. xxiii. (1899), p. 43 (not 

 C. smithii, Cresson, Trans. Amer. Ent. Soc. vii. (1879), p. 229). 

 Bolivia and Chile. 



Centris atripes, Mocsary. 

 Beeville, Texas, Aug. 29th, on plant No. 86 (C. H. T. Town- 

 send). New to the United States. C.foxi, Friese, is very closely 

 allied, but apparently distinct. 



Dialictus, Eobertson. 



The species of this genus have been described under various 

 genera, and one species {Hemihalictus lustrans) has been wrongly 

 referred to Dialictus by Crawford. The genus appears to include 

 the following : — 



Dialictus anomalus (Eobertson). Illinois. 



Dialictus occidentalis, Crawford. New Mexico. 



Dialictus theodori, Crawford. New Mexico. 



Dialictus parvus {Panurgus parvus, Cresson). Cuba. 



Dialictus subcyaneus {Dufourea subcyanea, Ashmead). Lesser 

 Antilles. 



Dialictus halictoides {Panurgus halictoides, Fox). Lower 

 California. 



Greeley ella, n. g. (Panurginse). 



A genus related to Hypomacrotera, having the following dis-, 

 tinctive characters : — 



(1.) Marginal cell shorter and more obliquely truncate than 

 in Hypomacrotera, but much longer than in Macroteropsis. It is 

 rather suggestive of that of Exomalopsis, which is otherwise a 

 very different bee. 



(2.) The first recurrent nervure meets the first transverse 

 cubital, as in Macroteropsis. 



(3.) The basal nervure is almost straight (like that in 

 Andrena), and it meets the transverso-medial. (In Hypo- 

 macrotera the basal falls far short of the transverso-medial). 



