s '_' VM. II. AJ3HMEAD. 



Front wings with two recurrent nervures, both received by the second 



cubital cell V lloriapt* Lepel. 



Fronl wings with only one recurrent nervure, the second wanting, the 



third discoidal cell absent Kyoiio lira Smith. 



9 Second cubital cell receiving both recurrent nervures. 



Abdomen black or nitons and black, almost glabrous; venter in 9 naked. 

 the anal segment excised ; J antennre L2 13jointed; scutellunj bitu- 

 berculate; postscutellutn unarmed; maxillary palpi l-jointed. 

 Melitloxena Morawit/. Type Af. truncate Nyl.) = ? .Nbmadtia Mocs. 

 Abdomen red and black, opaque, closely and densely punctate, the dorsal 

 segments at apex banded with an appressed, whitish pubescence; no 

 transverse furrow at base of segments; axillse acute or toothed at 

 apex: postscutellum armed with a median tooth. 



llo|>lo|>a*it<>* Ashm. 



Second cubital cell receiving only one recurrent nervure— the second, the first 



recurrent being received l>v the first submarginal cell at its apex. 



Abdomen red; dorsal segments 2 5 and the ventral segments 2 1 with deep, 



transverse furrows at base: pygidium with a median carina : scutellum 



unarmed llolcopasi ««*«* Ashm n. g 



in. Median and submedian cells equal or nearly. 



Maxillary palpi 5-jointed, the joints slender, elongate; labial palpi l-jointed. 



the first joint Large, elongate CaMioproNopis Holmb. 



11. Byes glabrous; postscatellum armed with a tooth orspine; teeth of mandi- 

 bles unequal, the apical tooth much the longer. 

 9 with the last abdominal segment truncate, in J, with the penultimate 

 and ultimate ventral segments with a lateral apical tooth. 



Dioxys Lepel. 



9 with the last abdominal segment acuminate, in J, with the penultimate 



ventral segment laterally bidentate Paradioxys Mots. 



Byes hairy: postscutellum unarmed: abdomen conical, in 9 acuminate at 

 apex, in J. armed with porrect teeth or spines; maxillary palpi 

 3-jointed CoelioxyN Latreille. 



Family XI. PANURGIDJC 



In this family I have placed all the Andrenoid bees, haviug but 

 two cubital cells in the front wings, and possibly this is the only 

 character that will hold them together, since, otherwise, characters 

 of mouth parts, tongue, labial palpi, etc.. there is the greatest di- 

 versity in length ami structure. It is therefore a composite family, 

 or what the French would call unefamille <lf convenience. 



The family, as here defined, probably had its origin from three dis- 

 tinct sources: some of the genera are clearly recent developments 

 from Andrena and Halictus, others probably came from the Antho- 

 phoridse, while still others have had a different or obscure origin. 



The genera placed here tire quite numerous, hut I believe may be 

 easily recognizable by the characters made use of in the following 

 table : 



