Vol. 5, p. 35-45, pi. 4. Octobeb 31, 1922. 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



NEW BEES OF THE GENUS ANDRENA. 



BY HENRY L. VIERECK. 

 U. S. Biological Survey. 



In order, at this time, to identify some species of Andrena 

 for my friend, Mr. Charles W. Johnson, I submit the following 

 descriptions and drawings in advance of my still uncompleted 

 monograph of Pan-American Andrena. 



Andrena (Andrena) tumida, new species. 



Type. — Boston Society of Natural History. 



Type locality. — Echo Lake, Mt. Desert, Maine, July 12, 1918 (C. W. 

 Johnson). 



Has characters in common with A. (A.) bisalicis Viereck. 



Female. — Length 9 mm. ; body black, mostly covered with pale-ochreous 

 hairs; head with its facial line : transfacial line :: 56: 65; axial line : temporal 

 line :: 29 : 17; malar line : joint 3 of antennae :: 2 : 9; elevated portion of 

 malar space distinctly shorter than the depressed portion; ocelloccipital line 

 : greatest diameter of lateral ocellus :: 3 : 5; head covered with pale-ochreous 

 hairs, front distinctly longitudinally striate, not elevated into a welt along 

 the fovea; fovea at most : ocellocular line :: 8 : 12; distance between fovea 

 and ocelli : ocellocular line :: 3 : 12; foveal band at upper end of inner eye- 

 margin represented by a shiny line, fovea attenuated below and continued 

 to a point apparently a little below the antennal line; fovea filled with golden 

 hairs that in some fights appear whitish, face nearly polished, indistinctly 

 reticulate, with shallow punctures that are as many as four puncture-widths 

 apart; clypeus distinctly elevated above the apical margin, abnormally con- 

 vex, partly polished, its punctures larger, well defined and closer; clypearea 

 present on the lower half, wide, clypeus thinly hairy, its sculpture not at all 

 hidden by hairs; labrarea truncate, its width at base : length down the middle 

 : : 12 : 5; width at apex : length down the middle : : 4 : 5; labrarea at base 

 : distance between lower corners of clypeus : : 12 : 20; labrum with a fringe 

 of dark-golden hairs, labrum without a median longitudinal crista between 

 its apical edge and the labrarea; joint 3 of antennae : 4+5 :: 8.5 : 8; joints 

 4 and 5 thicker than long, the succeeding joints from as long as thick to a 

 little longer than thick except joint 12 which is distinctly longer than thick; 

 antennae blackish throughout; mandibles atypical, robust, extending to the 

 outer edge of the labrarea, black except for the apical fourth and inner edge 

 which are more or less reddish; palpi nearly typical; thorax covered with an 

 abundance of pale-ochreous hairs which are shorter on the dorsulum than 

 on the mesopleurae, dorsulum shiny, finely reticulated and punctured much 

 like the face but denser; notauli represented by an impressed shining line; 

 hairs of mesopleurae and dorsulum concolorous, mesopleurae sculptured 

 somewhat like the dorsulum but not so closely or distinctly punctured; scutel 

 hairy and sculptured much like the dorsulum but more shiny, its punctures 

 sparse laterally, dense down the middle; metanotum hairy like the dorsulum, 



