172 entomological news. [September, 



The following form shows the northern extension of the same 

 type of Andrena in the Rocky Mountain region : 



Andrena prunorum Ckll. subsp. gillettei n. subsp. ^.—Length 11 mm.; 

 smaller and more slender than prunorum; antennae more distinctly crenu- 

 lated, entirely dark, without any ferruginous, even on scape; pubescence 

 of head and thorax very pale yellowish instead of fulvous; femora black, 

 with only the apex ferruginous; second and third abdominal segments 

 wholly ferruginous, except a small, oval, black spot on each side of second, 

 fourth segment ferruginous laterally at base; venter ferruginous, dusky 

 at apex; clypeus lemon-yellow, with two black spots. Thorax wholly 

 black. Abdomen closely and distinctly punctured, Wings dusky at apex; 

 stigma ferruginous; basal process of labrum emarginate. 



Hab. — Fort Collins, Colorado, April 15, 1897 (C. P. Gillette, 

 2468). 



o 



Sphaeridium scarabseoides Linn. 

 By C. Houghton, Potsdam, N. Y. 



This interesting species, which I first discovered here during 

 the Summer of 1896, is now quite common in this section of the 

 country. It may be confidently looked for at any time during 

 the months of June, July and August, provided one knows its 

 habitat. Unless he does it is safe to say that he will know but 

 little about the species, as I have never seen it anywhere except 

 in one place, viz., about the cow-droppings in the pastures. 



On any pleasant day during the three months above mentioned, 

 should one take a position near some fresh droppings, he would 

 probably soon see one of these beetles come flying rapidly across 

 the pastures and, hovering for a second over the spot, suddenly 

 bury itself in the soft excrement. With a stick or paddle it is 

 an easy matter to locate them, but one needs to be quite expert 

 with the pincers else he will soon lose his specimens, as it is a 

 very agile species and burrows out of sight with astonishing 

 rapidity. As soon as the droppings begin to dry up, it is useless 

 to look for them therein, as they immediately leave for other 

 places more to their taste. 



As an instance of their numbers in this locality, I might say 

 that I have taken, during the course of a quarter of an hour, as 

 many as twenty-five of these beetles from a single pile of drop- 

 pings. 



Associated with them 1 have found the following : Aphodius 

 fossor, Aph. prodromus, Aph. fitnetarius, Aph inquinatus, Aph. 

 varicola, Atcenius cognatus, Onthophagtis hecatc. Hister abbre- 

 viatus, Cercyon hcemorrhoidalis, Cleochara bimaculata, Philon- 

 thus longicornis and various other species of Staphylinida.-. 



