ANDREW A. 



441 



Head ( $ ) as wide as or (in c? generally) wider than the 

 thorax ; eyes oval, large ; ocelli in a triangle on the vertex ; 

 antennae filiform, basal joint of flagellum longest ; labial palpi 

 4-3ointed, basal joint longest, the following joints successively 

 shorter ; maxillary palpi G-jointed, the 2nd longest. Thorax broadly 



Fig. 138. — Andrena. 1, maxilla ; 2, labium. 



ovate ; fore wing with the marginal cell long and lanceolate, three 

 cubital cells, the 2nd and 3rd each receiving a recurrent nervure ; 

 legs moderately long, the posterior trochanters with a long floccus 

 of soft hairs ; posterior tibiae and tarsi densely pubescent on the 

 outer side. Abdomen somewhat elongate and massive, apical 

 margin of 5th segment and the 6th segment ( 2 ) furnished with 

 a dense pubescent fimbria ; in the males the abdomen is markedly 

 narrower and longer in proportion. 



The nesting-habits of the few Indian species of this genus that 

 I have had an opportunity of watching i^esemble those of their 

 European allies. I have found Nomada adusta, Smith, frequently 

 about the entrances to the nest-holes of Andrena mollis in the hills 

 in Burma. 



Key to the Species. 



A. Enclosed space at base of median segment 

 punctured. 



a. A medial vertical furrow from apex of en- 



closed space to apex of median segment. 



a'. Apical half of 1st to base narrowly of 6th 



abdominal segment reddish A. torrida, p. 442. 



b'. Basal two abdominal segments honey- 

 yellow, remainder black A. j-othneyi, p. 443. 



b. Median segment without a medial vertical 



furrow. 



a' . Apical half of Ist, all 2nd and 3rd (or 

 only basal margin of 3rd) abdominal seg- 

 ments reddish A. conununis, p. 443. 



b'. Apical margin of 1st with basp.l and apical 



margins of abdominal segments 2-4 [p. 443. 



narruwly honey-yellow A. mephistophelica, 



