102 Mr. T. D. A. Cockerel! on North- American 



liair on inner side of basal joint of hind tarsi pale fulvous; 

 abdomen minutely tessellate, impunctafe, with deiisPj broad, 

 yclIowish-white hair-bands on se<2:inents 2 to 4, that on 2 

 interruj)tcd in the middle; caudal fimbria very pale chocolate- 

 colonr. 



JJoh. Tasco, Washington State, May 25, 1896 {Trevor 

 Kiucald). Also from Colorado {Gillette, no. 2-470). 



'1 he Colorado example is somewhat smaller and has the 

 first joint of flagellum shorter, but it is surely the same 

 species. 



Tiiis species is to be compared with A, trizonata and 

 A. solids. From trizonata it may be separated by the 

 shining middle of thorax and the colour of the legs and 

 })ubescence. From iolicis it will be known by the dense 

 white (not fulvous) hair-bands and the larger process of 

 labrum. 



Andrena semipunctata, sp. n. 



? . — Length 10 millim. 



Black ; head and thorax quite dense!}' covered with erect, 

 stiff, dull white hair, not at all tinged with ochraceous; head 

 ordinary, facial quadrangle broader than long ; flagellum 

 brownish beneath, its iirst joint ratlier short; facial fovese 

 pale, separated by an appreciable interval from the eyes ; 

 clypeus very hairy all over and entirely covered (except a 

 very short median smooth line) with large confluent punc- 

 tures ; lower edge of clypeus with two dark brown bristles 

 pointed downwards ; process of labrum rounded, subtruncate; 

 mandibles reddish at a])ex ; mesothorax dull, minutely 

 roughened, with not very dense, irregular, large punctures; 

 median and parapsidal grooves distinct ; scutellum punctured, 

 its anterior half shining ; no black hair on thorax ; enclosure 

 of metathorax with radiating weak and mostly short ridges, 

 apex of triangle cut off by a sharp transverse ridge; tegulse 

 dark brown; wings hyaline, faintly clouded apically, ner- 

 vures and stigma (which is quite large) very dark brown, 

 basal nervure somewhat curved ; legs black, the small joints 

 of the tarsi more or less reddish ; hair on inner side of basal 

 joint of hind tarsi white; abdomen with the basal portions of 

 the segments (that of second to fourth raised) strongly but 

 sparsely punctured, the remaining portions minutely tessellate 

 and im]<unctate; apical lateral margins of the segments with 

 dense white hair- patches, very small on the first, larger on 

 each subsequent one, forming well-defined though medially 

 inlerru})ted bands on the third and fourth segments ; caudal 

 i mbria brownish sooty. 



