HYMEXOPTERA. ACULEATA. 



225 



In the second family, Apidae (fig. 59, 2), the tongue 

 is long and cylindrical, and makes a double fold under 

 the mouth when in repose. 



The Andrenidae are all Solitary Bees, living either 

 singly or in colonies; and therefore, there being no 

 community, no public works are required, and no supply 

 of extra workers is necessary. Each pair constructs its 

 own nest, and only the two perfect sexes are known in 

 these tribes. 



Fig. 58. Fig. 59. 



1. Tongue, &c. of Collates. 

 (A ndrenidce.) 



* 2. Tongue, &c. of Anthophora. 

 (Apidce.) 



The two first genera of the Andrenid, Colletes and 

 Prosopis, are easily distinguished from others by their 

 obtuse bilobed tongues, and from each other by their ap- 

 pearance, the species of Prosopis being naked, while the 

 Colletes are more or less hairy, the thorax being downy, 



* a, Tongue ; 6, Paraglossse ; c. Labial palpi ; /, Labium or mentum ; 

 d, Maxilla ; e, Maxillary palpus. {Note. a, b, c, f, are sometimes all in- 

 cluded in the name of " Labium.") 



Q 



