1912] Lacinia in Maxilla of Hymenoptera 
Augochlora. In this bee the galea has been reduced to a mere 
oblique knob at the distal end of the maxilla and the stipes 
transformed into a blade-shaped organ with a distinct palpifer 
and a five segmented maxillary palpus on the lateral margin 
near the distal end of the maxilla. 
LIST OF ABBREVIATIONS. 
Cardo. 
Proximal segment of cardo. 
Distal segment of cardo. 
Galea. 
Distal segment of galea. 
Proximal segment of galea. 
Lacinia. 
mp. Maxillary palpus. 
p- 
Se 
SO FOOT eae, Teale 2 RS a 
Palpifer. 
Stipes. 
PLATE XVIII. 
(Drawings by Alvah Peterson.) 
Periplaneta orientalis. 
Melanoplus differentialis. 
Macroxyela infuscata. 
Dolerus unicolor. 
Ophion bilineatum. 
Vespa maculata. 
Sphex pennsylvanicus. 
Bombus terricola. 
Apis mellifica. 
