SELECTED NOTES, ETC. 91 



bodies on which they are placed, as in the Lace-wing fly, the Lady- 

 bird, and Alcyrodes Cheledonii. Trustworthy observations cannot 

 be made upon the fact, except in living specimens, R. Beck says 

 — " The last joint of each tarsus is furnished at its extremity with 

 two hooks, and two longitudinal and parallel rows of delicate ten- 

 ent hairs ; by the aid of these the Acarus walks with some little 

 hesitation in an inverted position upon glass." His figure represents 

 a narrowly linear, undivided pulvillus, with eight tenent hairs on 

 either side. S. J. M. says nothing of the remarkable brooding of 

 the female over the eggs, so graphically described by R. Beck. 



I once found a Cheyletus' (species undetermined) running over 

 a dead chicken ; and in one of the insect cabinets in the vaults at 

 the British Museum I was shown a moth with several acari on its 

 wings. From a passage (I think in Kirby and Spence) it seems 

 to be not unlikely these may have been Cheyleti. This was, 

 however, many years ago, and they w^ere not examined with the 

 microscope. T. West. 



Sclccteb IHotee from tbe IHotc^BooF^e of 

 tbe Ipoetal flIMcroscoptcal Society. 



Mites, To Mount. — Mites, because of their transparency, look 

 better if stained. I have mounted some stained specimens from 

 humble-bees, and every part is thoroughly distinct. 



H. M. J. Underhill. 



Cheyletus eruditus (PI. IlL, Figs. 1-5).— I imagine that the parts 

 which 1 call falces (/, Fig. 2) are analogous to the falces of spiders. 

 I would call attention to the two beautifully delicate combs on 

 each falx. At first I thought there w^ere three — viz., two of the 

 larger sort and one small ; but more careful examination showed 

 me that I was deceived by two extremely slender claws, which by 

 refraction of light through the comb appeared to have teeth also 

 when the objective was slightly out of focus. These combs are 

 moved by three or four muscles which arise at the outer edge of 

 the basal joint of the falx (Fig. 4). The muscles which move the 

 chief claw have their origin further down. 



In the mouth proper I fancy I can detect two exceedingly 

 minute mandibles, one on each side of the rostrum, r. The 

 rostrum is hollow and retractile. It is moved by exsertor and 



