persicas 



13 



immediately behind which it lies in the ? (it is situate between 

 coxae II according to Laboulbene and M^gnin, 1882, p. 333). In the 

 £ it is half-moon shaped and surrounded by an oval ring narrower 

 than the capitulum and placed further back. 



The £ measures from 4 x 2"5 to 5 x 3 mm. (Nn. 1896) but it may 

 attain 8 x 5 mm. (Salmon and Stiles, 1901, p. 404). Fecundated $s 

 measure 7 x 5 to 10 x 6 mm. (Nn. 1896, p. 8) ; we have seen specimens 

 from Merced, California, measuring 10'4 x 63 mm. Gorged females may 

 however attain 11 x 8*5 mm. ; Lounsbury (1903, p. 5) and Donitz (1907, 

 p. 27) have seen specimens from Cape Colony 125 and 12'7 mm. long 1 . 



Fig. 3. Fig. 4. 



Figs. 3, 4. A. perticus. Female, dorsal and ventral aspect. Drawn from mounted 

 specimen. Salmon and Stiles, 1901 (figs. 71 and 72, 17th Ann. Rep., B.A.I., U.S. 

 Dep. Agr.) 2 . 



1 There is a considerable discrepancy in the measurements given by different authors, 

 due, no doubt, to the variation in size of A. persicus s and ? . Most authors do not 

 distinguish the sexes. 



2 Lounsbury (1903, p. 5) notes that asymmetry is common, a fact we have also observed ; 

 these figures show such asymmetry. 



