HYMENOPTERA — ANDRENIDZA. 263 
Andrenide and Apidz*, have been adopted by the generality of 
writers for the two primary divisions of the bees. 
In the first of these families, ANDRENIDE + (fig. 90. 1. Andrena 
nigro-nea @ ), the mentum is elongated, the labium at its extremity 
Fig. 90. 

small, and either spear-shaped (fig. 90. 2. head of Andrena with the 
organs unextended ; fig. 90. 3. the same with the parts fully extended) 
or cordate (fig. 90. 20. labium of Colletes), with a small ear-shaped 
lobe on each side, and being either straight or very slightly deflexed in 
some ( fig. 90. 4. apex of labium of Andrena, not folded backwards), 
and reflexed in others, and considerably shorter than the tubular 
mentum; the labium and terminal maxillary lobes not forming an 
elongated proboscis. The palpi are of the ordinary shape, the labial 
* As the preceding section, Predones, is divided into subsections, named from 
some peculiarity of structure or habits, which are again divided into families, it 
would be more uniform to consider the two divisions of the section Mellifera as 
subsections, instead of families, which might be named, from the different degrees of 
development of the mouth, Brachyglossata or Brevilingues, and Macroglossata or 
Longilingues; and these, again, might be divided into families, as the Megachilidz, 
Anthophoride, &c, I confess, however, that I prefer retaining the old Linnzan 
and Fabrician names to designate the groups which were originally comprised 
therein. 
+ Bistiocr. Rerer. to THE ANDRENIDZ®. 
Walckenaer. Mémoire pour servir 4 Hist. Nat. g. Halictus, 8vo. Paris, 1817. 
Imhoff. Description of Andrenidz, in Isis. 1832. 
Dufour, in Ann. Soc. Ent. France, 1838, p. 281. (Andrena lagopus, Megilla. ) 
Wesmael. Obsery, sur les Espéces du g. Sphecodes, Bruxelles, 8vo. 
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