74 ENTOMOLOGICAL NEWS. [March, 



A New Andrena from California. 



By T. D. A. COCKERELL. 



Andrena knutllina n. sp. ? about 8 l / 2 mm. long, <$ about 8 mm.; black 

 with pale pubescence ; face black in both sexes. Its place in the genus 

 may be understood by the following table : 



Abdomen partly or wholly rufous . . erythrogastra, mariae, etc. 



Abdomen black or dark brown, at most pale-banded . . i. 



1. Pubescence black . nigerrima, porterae, nigra. 

 Pubescence at least partly pale 



2. Face partly yellow or white, pulchella, aliciarum, cressoni, etc. (males. ) 

 Face wholly black, at least in 9 (pulchella alone has light-face marks 



in the 9.) . ... 



3. Pubescence of thorax bright ferruginous, wings very dark at apex. 



vulpicolar. 

 Not so ... 4. 



4. Hair at apex of 9 abdomen black or nearly so . . 5. 

 Hair at apex of 9 abdomen pale kincaidii, helianthi, etc., etc. 



5. Pubescence of thoracic dorsum bright ferruginous, halli, chromotricha 

 Pubescence of thoracic dorsum not ferruginous* . . . 6. 



6. Abdomen black without hair bands . . . vicinia, erraiis. 

 Abdomen with interrupted hair-bands 



Abdomen with continuous bands on all the segments. 



americana, electrica, apacheorum. 



7. Abdomen very distinctly punctate . . . prunifloris. 

 Abdomen tessellate and hardly or not punctare 



8. Basal process of labrum in 9 long, rounded, shaped like the end of a 



ringer ; hair of thoracic dorsum strongly tinged with ferrugi- 

 nous. . . macgillivrayi. 

 Basal process of labrum in 9 broad, truncate-emarginate ; hair of tho- 

 racic dorsum brownish-white ; nervures piceous, stigma pale 

 brown marginal with piceous ; ^ antennas wholly black, knuthiana, n. sp. 



The hair at the apex of the abdomen in A. knnthiaiui is sooty. 

 a kind of dark purplish-grey. The insect was collected by the 

 late Dr. Paul Knuth at Berkeley, Cal., Oct. 6, 1899; the $ 

 frequented flowers of Dancits carota. The specimens were sent 

 to by Mr. Alfken, to whom I transmitted a description, which 

 will, I suppose, be published in the last volume of " I'.lutenbi- 

 ologie." It seems desirable, however, to indicate the affinities 

 of the species in an American journal. 



* However, in macgillivrayi, it is really a sort of pale ferruginous ; in 

 fimbriala (aincricaua} it is yellow. 



