26 Mr. T. D. A. Cockerell — Descriptions and 



consisting of transverse bands on first four segments, dark 

 only on fourth, a large triangular area on fifth, and the 

 niiildle of sixth, the last being about evenly tripartite, the 

 sides yellow ; sixth segment with a delicate median sulcus on 

 its apical half. 



A. viridulus also occurs at Malcolm [Oertel), but that 

 species has a keel instead of a sulcus on the last ventral 

 segment and is much larger; it also has the anterior femora 

 heavily marked with black behind, while in sulcatalus they 

 are entirely yellow. Compared with A. texanus the new 

 species is smaller, with the stigma not so red, and the 

 markings on the legs and ventral surface of abJomen very 

 different. Compared with A.fasciatus it is separated by the 

 black basal half of the first abdominal segment, the colour of 

 the trochanters, &c. 



Ilab. Malcolm, Nebraska, September (^Birkmann^. 



The bees of Malcolm, collected by Mr. Birkmann in Sep- 

 tember, include both eastern and western types, the former 

 preponderating. Some of the more interesting are : — Antho- 

 phora walshit, Cress, (at flowers of Salvia) , Melissodes 

 bollonicE, Rob., M. vernonicB, Rob., Tetralonia cressoniana^ 

 Ckll., ? , var. with black flagellum (at flowers of Sxlvia), 

 Megachile emoryi^ Ckll., Panurginus piercei, Crawf. 



Megachile mucida semt'mucida, subsp. n. 



? . — Length about 15 mm. 



Hair of head black, except some pale ochreous between 

 antennce and on front ; of thorax above and at sides pale 

 ochreous, with a silky appearance, but on underside black; of 

 abdomen pale ochreous above on first segment and basal half 

 of second, otherwise, including the scopa, wholly black; hair 

 of legs black, more or less reddish on inner side of small 

 joints of tarsi ; hind basitarsi broad and flat. Wings strongly 

 iiifuscated. Mandibles 3-dentate ; clypeus very densely 

 punctured, with a median shining ridge, lower margin 

 shining and crenulate. 



^ . — Agrees well with Cresson's description of }[. mucida, 

 but the coxal spines are only moderately long, above each is 

 a large patch of fox-red pubescence ; the anterior femora are 

 pale yellowish suffused with red, marked with black apically. 

 W ings dusky throughout. Apical joint of anteunse some- 

 what dilated and flattened. 



There is a strong general resemblance to M. wootoni and 

 its allies, but, among other things, the dense black hair ou 



