OF WASHINGTON. 67 



Falls Church, Va. (Nathan Banks). According to Robert- 

 son's arrangement this will not even fall in the same genus 

 with N. modesta; it belongs rather to his genus Xanthidium, 

 but rests uncomfortably there. I think there must be real 

 affinity with modesta; if not, and the case is simply one of 

 convergence, it is truly remarkable. 



Two other bees collected by Mr. Banks show striking 

 peculiarities, which seem not to be of specific value: 



(1) Colletes americanus Cress., female, Great Falls, Va., 

 September n. Hair of thorax above bright orange ferrugi- 

 nous, like that of C. thoracicus and C. astecus. I cannot sepa- 

 rate the female from americanus; it is just possible that a 

 male might show differences. 



(2) Colletes nudus Rob. Falls Church, Va., June 23, both 

 sexes at flowers of Ceanothus. One male, not otherwise differ- 

 ing, has the first recurrent nervure entering the second sub- 

 marginal cell at the basal corner, quite the same on both sides. 

 It seems to be the transversocubital nervure that has shifted. 



At Falls Church, September 4, Mr. Banks took the female 

 of Epeolus vcrnoni(c Ckll., not hitherto described. It is con- 

 spicuously larger than that sex of E. pusillus, and has the 

 scutellum red. 



Mr. Banks has taken a number of interesting species of 

 Nomada at Falls Church, including N. Carolina Ckll. (female 

 April 25), N. undulaticornis Ckll. (male April 18, at pussy 

 willow), N. placida Cress. (Sept. 7), N. perplexa Cress. (June, 

 at Ceanothus), N. ovata Rob., etc. 



APRIL 2, 1908. 



The 22 ist regular meeting was held at the Saengerbund 

 Hall, 314 C street, N. W. In the absence of the President, 

 First Vice-President Heidemann presided. Messrs. Barber, 

 Burgess, Burke, Busck, Ely, Heidemann, Howard, Jones, 

 Kraus, Marlatt, Marsh, Patten, Popenoe, Sanders, Sasscer, 

 Schwarz, Webb, and Webster, members, and Messrs. H. L. 

 Frost and C. B. Hardenberg, visitors, were present. 



The following paper was read by Doctor Howard : 



