384 



FOBMIOmX. 



'. Metanotal spines not forming hooks. 

 a*. Basal portion of nietanotum not 



margined laterally. 

 a 3 . Pubescence sparse, almost entirely 



wanting. 



G . Pedicel spines wide-spreading, 

 shaped so as to encircle front 

 of ahdomen. 

 a 1 . Head with a tubercle on each 



side behind the eyes 



b~. Head not tuberculate 



b c . Pedicel spines not so wide- 

 spreading, not shaped so as to 

 encircle the abdomen. 

 a~. Head, thorax and abdomen 

 shining metallic blue or 



purple 



b~. Head, thorax and abdomen 

 black, the latter sometimes 

 red. 



a s . Head, thorax and node of 



pedicel coarsely punctured. 



a !) . Abdomen black ; length 



9-10-5 mm 



i n . Abdomen ferruginous; 



length 5'7 mm 



W. Head, thorax and node of 



pedicel finely punctured. 



a' J . Node of pedicel with 2 



median vertical short 



acute spines between 



spines on upper lateral 



angles of node 



b 9 . Node of pedicel without 



median spines 



6'. Pubescence dense, silk}' and re- 

 cumbent. 



a 6 . Abdomen red 



b B . Abdomen black. 



a 7 . Pubescence bronzy yellow or 



golden. 



n 8 . Two small teeth between 

 spines on upper lateral 

 angles of node of pedicel . 

 6 8 . Three small teeth between 

 spines on upper lateral 

 angles of node of pedicel . 



b~. Pubescence silvery 



b l . Basal portion of nietanotum dis- 

 tinctly margined laterally. 

 a 5 . Pronotal and metauotal spines 



subequal. 

 a. Length 7-9 mm. 



7 . Abdomen steel-blue 



V. Abdomen red 



b e . Length 6-7 mm. ; abdomen 

 bronze-green 



P. tubericeps : $.39l. 

 P. thompsoni, p. 391. 



P. venus, p. 392. 



P. armata (typical), 

 [p. 393. 

 P.fvrtis,?. 394. 



P. Jimi.Twelli, p. 394. 

 P. simplex, p. 394. 



P. bicolor, p. 395. 



P. dives, p. 396. 



P. qffinis, p. 396. 

 P. iibialis, p. 396. 



P. chalybea, p. 397. 

 P. abdominals, 



[p. 397. 

 P. cedipus, p. 398. 



