252 BRITISH TYROGLYPHID^E. 



suspect that Kocli may have described and figured 

 the male of 0. Canestrinii, firstly because his figure 

 has not got the projecting bursa copulatrix, which is 

 very large and conspicuous in the females of this 

 species. Koch, although he doubtless did not know 

 what was the function of the organ, was fully alive 

 to its existence, for he drew it in other Glycyphagi 

 when he was depicting the female ; presumably, there- 

 fore, he drew his figure of the present species from 

 a male, and if so, it was most like G. Canestrinii. 

 Secondly, the shape of his figure is more like a male 

 than a female. Thirdly, the hairs are too strongly 

 pectinated for the male of the present species. Grervais 

 simply refers to Koch ; Fumouze and Robin's admirable 

 paper was next, and if this had contained any indica- 

 tion of which they considered to be Koch's A. plumiger 

 I should certainly have followed them ; but, unfortu- 

 nately, it does not ; they doubtless only knew of one 

 species, and it is not at all easy to determine which. 

 The magnificent drawings by Lacherbauer, which illus- 

 trate the paper, are of the male only, and the female 

 is the characteristic sex. Had there been such drawings 

 of the female no doubt could have existed, but the 

 hairs seem rather too strongly pectinated for the male 

 of the present species, and Lacherbauer was a most 

 exact draughtsman. All these, however, are arguable 

 grounds, whereas there is not any doubt about Berlese's 

 drawing from Canestrini's specimens. 



Of course it is possible that there may be even more 

 species than above referred to. 



Female. Male. 

 Average length about . . '30 mm. '20 mm. 



breadth about 



length of legs, first pair, about 

 ,, second pair, about 



third pair, about 



fourth pair, about 



20 

 13 

 13 

 13 

 17 



12 

 14 

 U 

 12 

 16 



Both Berlese and Canestrini describe this species as 

 somewhat larger than G. Canestrinii; the English 



