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



Ceocisa. Latr. 



Aslimead says of Crocisa^ " labial palpi 2-jointed, maxillary 

 palpi 5-jointed." Smith says the maxillary palpi are 

 2-jointed, labial palpi 5-jointed. Bingham agrees with 

 Smith. In Crocisa ramosa, Lep., we find the maxillary palpi 

 2-jointed, the first joint short and globose, but the labial palpi 

 are only 4-jointed, the suture figured by Bingham and Smith 

 between the second and third long joints bi'ing non-existent. 

 I'he true third joint (/. e. the first of the small terminal ones) 

 is very stout. 



ASHMEADIELLA, CkU. 



In A. higelovke (CkU.) the maxillary palpi are 4-jointed ; 

 joint 1 short and broad, 2 longest, 3 and 4 about equal. 



Alcidamea, Cresson. 



According to Cresson the maxillary palpi of this genus are 

 4-jointed, but in Alcidamea simplex (Cress.), from Kansas, 

 ■we find the maxillary palpi with five very distinct joints, 1 

 and 2 short, 3 long and cylindrical, 4 and 5 also cylindrical, 

 4 a good deal shorter than 3, 5 shorter still and perhaps a 

 little shorter than 1 or 2. 



Ceeatina, Latr. 



The type of this genus is C. albilahn's, Fabricius, a syno- 

 nym of C. cucurhitina^ Rossi. This insect is black, and has 

 5-jointed maxillary palpi, as stated by Friese and confirmed 

 by us in specimens received from him. Taschenberg and 

 Friese state that the maxillary palpi of Ceratina have from 4 

 to 6 joints; F. Smith says there are 6 joints, the three 

 basal ones about equal, the three apical minute. Ashmead 

 has recently (Tr. Am. Ent. Soc. 1899, p. 69) regarded the 

 species with 6-jointed maxillary palpi as typical Ceratina, and 

 has proposed a new genus, Zaodontomerus (printed Zadonto- 

 merus, but corrected by the author in my copy), for those with 

 the maxillary palpi 4-jointed. 



We have examined a number of species, and find three 

 with 5-jointed maxillary palpi, seven with 6 joints, and none 

 with 4. ]\loreover, a specimen of G. tejonensis^ the type of 

 ZaodontGoneriis, has 6-jointed maxillary palpi. This example 

 ul tejonensis is an Illinois one, received from Mr. Robertson, 

 and we believe it is correctly identified. It seems not im- 

 possible that the records of Ceratina witli 4-jointed maxillary 



