384 FOHMICID.E. 



h'\ ^letanotal spinos not foniiing hooks. 

 «*. Basal portion of nn'tanotum not 

 margined laterally. 

 a'. Pubescence sparse, almost entirelj"- 

 wanting. 

 d'. Pedicel spines wide-spreading-, 

 slia])ed so as to encircle front 

 of abdomen. 

 a''. lleadAvitli a tubercle on eacli 



side behind the eyes P. tuhevkeps, p. 391. 



h'. Head not tuberciilate P. thompsoni, p. 391. 



b'\ Pedicel spines not so wide- 

 spreading-, not shaped so as to 

 encircle the abdomen, 

 ft". Head, thorax and abdomen 

 shining metallic blue or 



purple P. venus, p. 392. 



L'. Head, thorax and abdomen 



black, the latter sometimes 



red. 



ft\ Head, thorax and node of 



pedicel coarsely punctured. 



ft'. Abdoaien black ; length 



9-10-5 mm P. annaia (typical), 



/> '. Abdomen ferruginous ; [p. 393. 



length 0-7 mm P. fort is, p. 394. 



Ij^. Head, thorax and node of 



pedicel finely punctured. 



«■'. Node of pedicel with 2 



median vertical short 



acute spines between 



spines on upper lateral 



angles of node P. Iiaif.rrvelli, p. 394, 



i'\ Node of pedicel without 



median spines P. simpler, p. 394. 



h'. Pubescence dense, silky and re- 

 cumbent. 



fl^. Abdomen red P. bicolor, p. 395. 



¥. Abdomen black. 



cf. Pubescence bronzy yellow or 

 golden, 

 ft'^. Two small teeth between 

 spines on upper lateral 

 angles of node of pedicel . P. dives, p. 396. 

 i\ Three small teeth between 

 spines on upper lateral 

 angles of node of pedicel . P. qffinis, p. 39(i. 



b'. Pubescence silvery P. tibialis, p. 39(). 



b^. Basal portion of metanotum dis- 

 tinctly nuTrgined laterally. 

 a'. Pruuotal and metauotal spines 

 subequal. 

 ft". Length 7-9 mm. 



ft". Abdomen steel-blue P. chalyhea, p. 397. 



6". Abdomen red P. abdomijialis, 



b'\ Length 6-7 mm. ; abdomen [p. 397. 



bronze-green P. wdipus, p. 398. 



