1 62 PSYCHE [August 



Thorax not pruinose ; more or less polished. Mexico ...... 68, 



68. Metathorax transversely striate .......... 71. 



Metathorax transversely rugose or punctured ....... 69. 



69. Antennae reddish ; scutellum channelled ..... 49. picipes C&rxi^ 

 Antennae black ; scutellum rugose .......... 70. 



70. Face golden-pubescent ........ 47. alticola Cam. 



Face with sparse black hairs onlii- ...... 22. at>iccfs'6\w\\\\ 



Face with silvery pubescence and black hairs .... 48. trichiosoma Cam. 



71. Scutellum rugose or coarsely punctured ......... 73. 



Scutellum deeply longitudinally channeled ........ 73. 



Scutellum finely punctured ; sides of thorax silvery pubescent 50. consors Cam. $ . 



72. Thoracic punctures close ; metathorax trans-striate ; hairs of face sparse 



51. nigrocaeritlea Canv 



Sculpture of thorax indistinct, the metanotal striae oblique ; hairs of face dense and 



silvery in the male ........ 34. inediata Cress. 



73. Thorax shining, punctured ......... 54. corn Cam. 



Thorax opaque, finely rugose ....... 56. voltatiica Cam. 



74. Pubescence of body white ........ 59. nearctica Kohl. 



Pubescence of body black . . . . . -Si- exfremitata Cres?,. $. 



75. Small slender reddish species with long petiole and transversely striate thorax 



63. 'Mrightii Cress. 



The following list includes the species of this group which have been described 

 as from North America. The species are given in chronological order and show no 

 phyletic sequence. 



PsAMMOPHiLA Dahlbom. 



1. violaceipennis Lep., Hym., vol. 3, p. 370. (1845). Amer. bor. 



ceutentaiia Smith, Cat. Hym. Brjt. mus., vol. 4, p. 223. (1856). 



robiista Cress., Proc. Ent. soc. Phil., vol. 4, p. 461. $. (1865). 

 communis Cress., ibid., p. 462. $ . 



2. luctitosa Smith, Cat. Hym. Brit, mus., vol. 4, p. 224. $. (1856). Can. U. S., Mex., 



Cuba. 

 argentifroHS Cress., Proc. Ent. soc. Phil., vol. 4, p. 462. i^ . (1865). 

 mexicana Sauss., Reise No vara. Hym., p. 25. (1868). 



3. valida Cress., Proc. Ent. soc. Phil., vol. 4, p. 461. 5- (1865). Col. 



4. grossa Cress., Trans. Amer. ent. soc, vol. 4, p. 209. $. (1872). Tex. • 



Melander and Brues, Biol, bull., vol. 2, p. 41. $ . (1902). 



5. montana Cameron, Biol. Cent.-x\mer. Hym., vol. 2, p. 20. $. (1888). Mex. 



6. Jason Cam., ibid., p. 20. $. Guatemala. 



7. rt//e.<;/'r/5 Cam., ibid., p. 21. $. Panama. 



8. sonorensis Czixn., ibid., p. 2 i . $. Mex. 



9. mor/'/son/ Cair\., ibid., p. 21. ^. Mex. 



10. p/reiz'e»/ris Cain., \h\d., p. 22. $. Guatemala. 



11. quadridentata Cam., ibid., p. 23. 5- Mex. 



12. pacifica Melander and Brues, Biol, bull., vol. 2, p. 42. $ . (1902). Cal. 



