74 ENTOMOLOGICAL NEWS. [March, 



A New Andrena from California. 



By T. D. A. COCKERELL. 



Andrena knnthina n. sp. — 9 about 8>^ 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. 



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. 



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



vnlpicolar. 

 Not so 4. 



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

 Hair at apex of 9 abdomen pale . kincaidil, 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, errans. 



Abdomen with interrupted hair-bands 7. 



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. 



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



finger ; hair of thoracic dorsum strongly tinged with ferrugi- 

 nous macgillivra3ri> 



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

 racic dorsum brownish-white ; nervures piceous, stigma pale 

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



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

 a kind of dark purplish-grey. The in.sect was collected bj- the 

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

 frequented flowers of Daucns 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 " Blutenbi- 

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

 of the species in an American journal. 



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

 fimbriata {americana) it is yellow. 



