104 J\Ir. T. D. A. Cockerell on North- American 



Andrena Porterie, Ckll. 



Gallinas River, at Las Valles, N. M. ; females at flowers 

 of Rihes, April 20, 1901. 



Andrena carlini, Ckll. 



Fort Collins, Colorado, June 11, 18i)D {Titus). New to 

 Colorado. 



Andrena Groinicheri, sp. n. 



$ , — Length about 12 niillim. 



Black, with pale oelireous pubescence ; head ordinary, 

 cheeks rather swollen ; fla<;ellum brownish beneath, its first 

 joint considerably longer than the next two together ; clypeus 

 nude except at sides, shining, with strong, rather sparse 

 punctures, no median ridge ; facial foveas broad but short, 

 yellowish white, veiy close to orbital margin ; process of 

 iabrum low and rounded, slightly truncate at apex; meso- 

 thorax dull, granular, with barely visible shallow punctures ; 

 base of metathorax granular, with no transverse ridge ; tegulaj 

 light amber ; wings milky-white, nervures and stigma dark 

 ferruginous; stigma small, second submarginal cell very 

 broad, third no broader above than second ; legs with the 

 middle and hind tarsi, small joints of all the tarsi, and apices 

 of hind tibiae ferruginous ; abdomen impunctate, with thin 

 liair-bands on the second and following segments; fimbria 

 very pale fulvous, not copious. 



IJal). Milwaukee, Wisconsin, Aug. 28 (Dr. Sigmund 

 Orauiicher). 



Closely related to A. helianthi, Rob., but a smaller insect, 

 recognizable by its milky wings. Allied also to A. nitidior^ 

 Ckll. Robertson's description of A. helianthi suggests that 

 lie may have confused Q r<enicheri with it ; but the species I 

 recognize as helianthi agrees with an authentic specimen 

 received from Mr. Robertson. 



1 may also remark that in separating A. kansensis from 

 A. Cressoni (Ent. News, 1899, p. 255) 1 treated as typical 

 C'ressoni a species rejiresented by an authentic example from 

 j\lr. Robertson, though it is evident that he regarded tiie two 

 insects as identical, and included both in his conception of 

 Cressoni (see remark in Trans. Am. Ent. Soc. 1891, p. 49). 

 It a])]x'ars, moreover, that he considered the kansensis form 

 as the more typical, though less common. 1 ought j)erhaps 

 to transier the name Cressoni to the kansensis form and 

 rename the insect I held for Cressoni; but before doing this 



