60 PROCEEDINGS OF THE ACADEMY OF [1896. 



11. Perdita octomaculata (Say). Cr., Cat. Apidse, 1879, p. 216. 



PanurguB 8-maculatiis Say, Long's 2d. Exped., ii, p. 350, 1824. ^$ (Hab., U, 

 S.). 



I have a 9 from New York State, sent by Dr. Skinner, and a ^ 

 from southern Illinois, sent by Mr. Roberston. Mr, Fox informs me 

 that he has seen specimens from the White Mts., N. H., collected by 

 Mrs. Slosson,New York, New Jersey and Virginia. He has taken it in 

 southern New Jersey, but sparingly. Prof. J. B. Smith reports it 

 from Westville, N. J., on Cresson's authority. Of its habits, nothing 

 has been recorded, but Mr. C. Robertson informs me that he has 

 taken it from Aug. 13th to Sept. 20th, on flowers o^ Solidago canad- 

 ensis, Coreopsis aristosa and Aster ericoides var. villosus. 



Three allied species found on Mentzelia in New Mexico. 



12. Perdita mentzeliae n. sp. 



$ . — About 5j mm. long. Head rather large, quadrate, broader 

 than thorax, mandibles simple, cheeks beneath with a prominent 

 tooth, lower margin of clypeus nearly straight; vertex finely 

 rugulose, with sparse feeble punctures between the ocelli and the 

 antennae ; eyes narrow. Color very dark blue-green, with the whole 

 of the face beneath the antennse, and the lower half of the cheeks, 

 including the spines, orange-yellow. On each side of the face the 

 yellow extends upward, narrowing to a point on the orbital margin 

 about two-thirds the length of the scape above the level of the 

 insertion of the antennae. Mandibles yellow with ferruginous tips. 

 Antennae yellow, becoming deep orange toward their tips ; the 

 flagellum slightly marked with blackish above. 



Thorax shiny, very dark blue-green, becoming black on the 

 scutellum and hind part of mesothorax, metathorax tinged with 

 blue. Collar, tubercles, under side and part of hind border of pro- 

 thorax orange-yellow. Mesothorax with only a few scattered indis- 

 tinct punctures. Metathorax minutely granular. Pleura, anterior 

 border of mesothorax and sides of metathorax with scattered white 

 hairs, 



Tegulse hyaline ; wings hyaline, nervures very pale yellowish. 

 Marginal cell about or hardly as long as stigma. Second sub- 

 marginal not narrowed one-half to marginal. Third discoidal 

 hardly perceptible. 



Legs orange ; posterior femora with a brown patch behind ; poste- 

 rior tibiae and tarsi mostly brown. Abdomen orange-yellow, first 

 segment almost all black, segments 2, 3 and 4 with broad suffused 



