148 ENTOMOLOGICAL NEWS [April, '09 



obliquely, irregularly striated, a middle channel which is foveolated. 

 Posterior face separated from the metanotum by a somewhat indistinct 

 f ovea ; bounded laterally by faint carinae ; a triangular fovea ; rather 

 finely rugose. Metaplurae very finely transversely striated. Legs 

 normal ; hind basitarsus as long as the remaining tarsi. First dorsal 

 abdominal segment with large separated punctures ; second and third 

 dorsal segments with smaller more widely separate punctures, those on 

 the third segment smaller and fewer ; the remaining dorsal segment 

 with smaller, sparser punctures. -All the ventral segments with a trans- 

 verse punctured, apical line, apical segment with close large punctures. 

 Pygidium deeply channeled, excavated posteriorly, with a lateral fringe 

 of stiff hair. Color black; spot on mandibles, scape and pedicellum, two 

 transverse spots on the pronotum, tubercles, spot under the wings, 

 spots on the lateral, anterior corners of the scutellum, postscutellum, 

 stripe on the four anterior tibia outwardly, posterior tibia except apex, 

 tarsi, lateral spots on second, third and fourth dorsal segments, a 

 band on the dorsal fifth, yellow; tegulae testaceous. Wings sub-hyaline ; 

 venation brown. Clypeus and facial basin with silvery pubescence ; head 

 and thorax with long grey hair. 



Habitat. Virginia, Glencarlyn, July 26: Great Falls, July 

 31. Type from Glencarlyn. Named after Mr. N. Banks, who 

 collected the specimens. 



This species seems to connect Fox's groups scabcr and chry- 

 sarginus. The sculpture of the head is that characteristic of 

 group scabcr, while the lateral fringe of the pygidium is that of 

 group chyrsarginus. In Fox's table it runs to 19, where it goes 

 out because of the coarsely punctured head and fringe of the 

 pygidium. If the pygidial fringe be discarded it would go to 

 stirpicolus Pack., but it is not that species. If the sculpture of 

 the head should be discarded it would go to odyneroides Cress., 

 but is widely different from that species. C. banksi does not 

 fit any of Ashmead's genera, but comes in with PsQiidocrabro 

 Ashin. and Xylocrabro Ashm. 



Crabro (Protothyreopus) megacephalus Rob. 



A $ from Florissant, Cal., June 14, 1903, on sand (S. A. 

 Rohwer), seems to be the male of this species. It differs from 

 the 5 as follows: 



Pronotum not so strongly dentate, but more keeled anteriorly and 

 somewhat sharper at the angles; posterior face of metathorax more 

 strongly transversely striated; mesoplurae more strongly striated; punc- 



