NEW SPECIt;S OF ANDRENA FROM NORTH AMERICA. 305 



ripens, becomes parched up and more or less bleached in the 

 hot rays of the summer sun, points to Aira ccespitosa, the food 

 of arciiosa. 



Folkestone, November 4tb, 1897. 



Note. — In reading Mr. Morris's description, his meaning 

 will be much simplified by bearing in mind that by "the wings" 

 he meant all four wings, so that " the upper part of the wings" 

 =^ the upper wings, just as "the wings underneath" (or "the 

 under part of the wings ") = the undei- tvings. — H. G. K. 



NEW SPECIES OF ANDRENA FEOM NORTH AMERICA. 

 By T. D. a. Cockerell, N. M. Agr. Exp. Sta. 



The bees of the genus Andrena are very numerous in North 

 America, but up to the present time they have received com- 

 paratively little attention. Mr. F. Smith, many years ago, 

 described a number of species from Canada and the Eastern 

 United States, as well as five from Vancouver's Island. Mr. 

 Cresson described several from Texas, and one from New Mexico. 

 Mr. Ashmead described four collected by the present writer in 

 Colorado. L'Abbe Provancher made known some new species 

 from Canada, and two from California. From Mexico six have 

 been described by Smith, and one by Gribodo. 



Subsequent to most of the above-mentioned publications, 

 Mr. Eobertson made a careful study of the Andrence of Illinois, 

 and Miss J. E. Casad and the present writer studied those of 

 New Mexico, and in each of these regions most of the speciea 

 were found to be still undescribed. 



So far, one hundred and fourteen species of Andrena have 

 been described from North America (including Mexico). The 

 European list is much longer. 



(1.) Andrenja pascoensis, n. sp. 

 ? . Length about 15 mm., head aud thorax black, legs and abdomen 

 mosthj rufous. Pubescence greyish white. Face about as broad as long, 

 its sides covered with greyish white pubescence. Clypeus ivith a diffused 

 central yellow patch ; end of scape, and first flagellar joint, ferruginous 

 beneath. Mesothorax moderately shiny, microscopically tessellate, 

 with large punctures, becoming extremely dense at sides; enclosure ot 

 metathorax ill-defined. Tegulte amber colour, transparent ; tn7igs 

 strongly suffused ivith yellowish, except the apical cells ; apex dusky with 

 a slight violaceous lustre ; nervures and stigma pale ferruginous. 

 Legs ferruginous ; the coxge, anterior femora behind, middle femora 

 except apical third, and posterior femora except extreme tip, black ; 

 pubescence of basal joints of tarsi ferruginous. Abdomen rather shiny. 



