2. tfOHADA. 113 



bescence ; the wings subhyaline, faintly clouded at their apical 

 margins, the nervnres and tegulae rnfo-testaceous ; legs black, the 

 anterior and intermediate femora above, the tibiae, and tarsi f erru- 

 ginous ; the anterior and intermediate pairs hare a black stain 

 behind. Abdomen obscure ferruginous, the base black, sometimes 

 two yellow or ferruginous spots on the basal segment, the second 

 having a broad transverse yellow fascia, attenuated in the middle 

 and usually interrupted ; the four following segments have each a 

 narrow transverse fascia, the first two usually slightly interrupted, 

 but frequently the fasciae are entire : beneath obscure rufo-piceous ; 

 sometimes the third and fourth segments have an obscure trans- 

 verse yellow stripe, but are usually immaculate. B.AI. 



This species is the parasite of Andrena clarkella. It has been 

 taken with that bee as early as the 10th of April, on Hampstead 

 Heath ; it has also been found at Leominster, at Xewcastle, and at 

 Carlisle. Specimens have been received from Dr. Xylander under 

 the name of N. horealis of Zetterstedt. It appears to be extremely 

 local, and probably at no time abundant. 



3. Noinada signata. 



N. atra, thorace lineis quatuor longitudinalibus ferrugineis, ab- 

 domine rufo fas ci is que flavis ornato. 



Xomada signata, Jurine, Sym. tab. 10. gen. 31 $ . 

 Smith, Zool ii. 602 S $ ', Bees Great Brit 125. 

 Thorns. Hym. Scand. ii. 191. 



Female. Length 4-5 lines. — Head and thorax black, the clypeus 

 anteriorly, a spot above it, the orbits of the eyes, the antennae, 

 labrum, and mandibles ferruginous ; the scape has a black line 

 outside. Thorax — the collar, tubercles, a large patch on the breast 

 on each side, a minute dot under the wings, four abbreviated longi- 

 tudinal stripes on the disk, and the scutellum ferruginous ; wings 

 subhyaline, their apical margins having a dark fuscous cloud ; the 

 tegulee ferruginous ; the legs ferruginous, the base of the femora 

 black ; the metathorax variegated on each side with irregular yel- 

 low stripes or spots. Abdomen ferruginous, the first segment biack 

 at its base and having a broad, irregularly waved fascia, sometimes 

 interrupted ; the following segments have a broad yellow band, 

 leaving a narrow rufo-piceous border on the apical margins ; the 

 second, third, and fourth segments beneath have a transverse broad 

 yellow stripe ; the stripes frequently obscure. B.M. 



Male. Length 4—5 lines. — This sex closely resembles the female, 

 but differs in having the labrum, margin of the clypeus, and the 

 mandibles yellow ; the antennae fuscous above ; the clypeus has a 

 silvery pubescence ; the thorax black, the tubercles yellow, the 

 tegulae and two dots on the scutellum ferruginous ; the basal seg- 

 ment of the abdomen has sometimes an obscure yellow fascia, but 

 it is usually obliterated and there are merely two black dots. B.M. 



