183 Pyg 



Pupal sac. — The thin, semi-transparent membrane 

 enveloping tlie head and thorax of the pupse of 

 Anopheles maculipennis. (Nuttall and Shipley.) 

 (L. pupa, and sac.) 



Puparium. — The secretionary covering of many 

 CoccidiB, The last larval skin which, in the 

 case of Diptera, protects the pupa. (L. pupa.) 



Pupation. — The period occupied in changing from 

 the larva or nymph into the imago. The third 

 stage of an insect's life ; the period of histology. 

 (L. ])upa.) 



Pupil, Pupilla. — The central spot of the ocellus. 

 (L. pupillus.) 



Pupiparous. — Bringing forth pupse. (L. pupa, and 

 pario, to bring forth.) 



Purpureal. — Purple. (Gr. purpura.) 



Purpureus. — (Gr. purpura.) See Puniceus. 



Pustule. — A point of large circumference. (L. 

 pustula, a blister, pimple, etc.) 



Pustulate, Pustulosus, Pustulous.— Covered with 

 pustules ; poc-like. (L. pustula.) 



Pygidium. — The last dorsal segment of the 

 abdomen. (Gr. pygidion, dimin. from pnge, the 

 the rump.) 



Pygidium. — A horny chitinous organ of very 

 variable shape, situated between the last dorsal 

 and ventral sclerites ; between the branches of 

 the forceps of the Elatidse. 



