2. NOMADA. 121 



gated white spots on each side, those on the fifth uniting, the 

 sixth has a transverse macula ; beneath, a transverse white line on 

 the third and fourth segments in the middle, but frequently imma- 

 culate. B.M. 



This speciesis parasitic on Andrena argentata, and appears inAugust; 

 it was first discovered at Sandhurst, and has since been taken at 

 Weybridge in some numbers, and very abundantly at Bournemouth. 

 Dr. Nylander says it is found both in Denmark and Sweden. 

 Thomson thinks it may be the alboguttata of Herrich-Schiiffer ; but 

 if his description is correct, it certainly cannot be. I have never 

 seen a continental specimen. 



11. Nomada xanthosticta. 



N. atra, antennis subtus scutellique punctis ferrugineis ; abdomine 

 rufo, segmentis secundo et tertio maculis duabus flavis. 



Nomada xanthosticta, Smith, ZooL ii. (300 ; Bees Great Brit. 128 £. 



Schenckf Nass. Bien. 191. 

 Api? xanthosticta, Kirby, Mori. Apum Angl. ii. 212 $. 

 Nomada mistura, Smith, Bees Great Brit. 133 J. 



Female. Length 2-3| lines. — Head and thorax black ; the ilagellum 

 beneath, the mandibles, and the lab rum ferruginous, the latter 

 obscurely so, sometimes black, the scape black. Thorax : the tegulse 

 ferruginous, the tubercles yellow, the scutellnm having sometimes 

 two minute obscure ferruginous spots ; wings subhyaline, their 

 apical margins having a fuscous cloud, the ncrvuresfusco-ferruginous; 

 the legs ferruginous ; the coxa?, the trochanters, the femora beneath, 

 the tibia? above, and the basal joints of the posterior tarsi above 

 fuscous. Abdomen ferruginous, the extreme base black, the apical 

 margins of the first and second segments faintly rufo-piceous, the 

 apical margin of the third and the basal margin of the fourth nar- 

 rowly rufo-piceous : the second and third segments have on each 

 side a round yellow macula, that on the latter minute ; the fifth 

 with a square white macula ; beneath immaculate. B.M. 



Male. Length 3 lines.- — Black ; the anterior margin of the clypeus 

 narrowly, and the mandibles, yellowish red, the tips of the latter 

 rufo-piceous ; the flagellum ferruginous, usually more or less fuscous 

 above ; the face with short, thin, griseous pubescence. Thorax 

 above with thin short fulvous pubescence, on the metathorax, the 

 sides, and beneath it is griseous ; wings subhyaline, iridescent, 

 clouded at their apical margins, the nervures ferruginous ; the tips 

 of the femora, the anterior tibia?, the base and apex of intermediate 

 and posterior pairs, and all the tarsi rufo-testaceous ; a dark stain 

 on the anterior tibia? behind. Abdomen : the apical margins of 

 the segments more or less distinctly ferruginous, the second and 

 third segments have, laterally, an oblong white macula, the first 

 largest, sometimes there is also a minute macula on the fourth, and 



