110 



trifft man auch die cTc/, auf letzteren hingegen nicht, da 

 dieselben ja keinen Pollen einsammeln." 



I am not able at this moment to say definitely, whether 

 Hoffmanseggia falcaria only delivers pollen and not honey, 

 but I am of the opinion that such is the case, as there is 

 no smell to the flowers, but even if it does only give pollen, 

 it is not in accordance with Ducke's remarks that cTcT are 

 not met with on plants that only supply pollen, as by refer- 

 ence to my following list of bees that visit Hoffmanseggia 

 falcaria it will be noticed that the cf cT of several species 

 have been taken on it, and in some cases the cfcT were in 

 the majority; this could possibly be explained, however, by 

 the fact that the c/'cT in several instances were much the 

 commoner, although the question must remain unanswered 

 for the present. 



I have added approximately the proportion of the sexes of 

 the following bees that are found on Hoffmanseggia falcaria: 



Megachile Jenseni. Very common in both sexes, 



Megachile Steinbachi. ? rare, cT very common. 



Megachile Hieronymi and M. rhinoceros. Occasionally; 

 cT more frequent than $. 



Megachile Biirmeisteri, M. argentina and M. Jörgenseni. 

 Single specimens of $$. 



Teiralonia corvina. cf much more frequent than ?. 



Tetraloniaflavitarsis var. bicincta. ? noticeably common; 

 cT not rare. 



Canephora apiformis. $ exceedingly common ; cT in few 

 numbers. The species not seen on other plants. 



Melissa Jenseni. $ somewhat commoner than cT- 



Centris nigriventris. $ in numbers; cT only few speci- . 

 mens. The species not taken on other plants. 



Centris tricolor Mostly $. 



In the following list of bees that have been taken on 

 Hoffmanseggia falcaria no notice is given as to the frequency 

 of the sexes : 



Commonly or as a rule only 

 found on Hoffm. falc: 



Canephora apiformis. 

 Melissa Jenseni. 

 Centris nigriventris. 

 Centris tricolor. 

 Megachile Jenseni. 

 Megachile Steinbachi. 

 Tetralonia flavitarsis v. bicincta. 

 Tetralonia corvina. 



Occasionally: 



Tetralonia nigriceps. 

 Tetralonia fervens. 

 Centris Brethesi. 

 Anthidium nigerrima. 

 Anthidium 20 — punctatum. 

 Megachile Burmeisteri. 

 Megachile argentina. 

 MegachHe Jörgenseni. 

 Xylocopa brasilianorum, 

 Caupolicana lugubris. 



