Hot-liouse Mites. 
189 
caterpillars feed above ground. It is also found useful to 
sprinkle lime, lime and soot, or kainit, round individual 
plants. 
Hot-house Mites. 
In my last Annual Report mention was made of certain 
mites, exceedingly troublesome to horticulturists, of the obscure 
genus Tarsonemus , which I had under investigation in the 
autumn of 1904. The investigation has made little progress 
on account of lack of material ; for, though I have found the 
mites on leaves sent for examination, I have not been equally 
successful in obtaining diseased plants on which to observe the 
life-liistory of these creatures, those which have been sent 
invariably proving to be infested by various other pests, but 
not by the particular mites in question. They are excessively 
small, no larger than the black-currant mite ; and not being 
crowded together in buds, but dispersed over the leaves, the 
search for them is much more laborious ; but the attempt to 
throw some further light on their habits is not abandoned. 
Meanwhile a further search into the very scattered literature 
on the subject has disinterred a few more species of 
Tarsonemus , which have been from time to time described, so 
that the list of known species given in the last Report for the 
assistance of those who desire to study these creatures must be 
extended. 
List of species of Tarsonemus hitherto described. 
1. T. floricolus Canestrini & Fanzago, Atti del Sac. Veneto- Trentina di 
Sci. Nat., Vol. 5, 1876. Found on many different plants, but probably other 
species have sometimes been included under this name. 
2. T. Kir diner i Kramer, Archiv.f. Nat. Jahrg., Vol. 42, page 199. This mite, 
found inside the galls of an Eriophyes , was described under the genus 
Deudroptus. 
3. T. buxi Can. & Fan., Atti del Sac. Veneto- Trentina di Sci. Nat., Vol. 9, 
page 8, 1884. Found on box leaves. 
4. T. oryzce Targioni-Tozetti, Annuli delV Agricoltura, Vol. 1, 1878. Found 
in diseased rice ; male unknown. 
5. T. minusculus Can. & Fan., t.c. Found on the body of another mite ; 
male unknown. 
6. T. spirifex Marchal, Bull. Sue. Ent. Fr., 1902. Found on diseased oat 
plants. 
7. T. soricola Oudemans, Tijd. voor Ent. Jahrg., 1903, page 5. The male 
only found on a shrew. 
8. T. brevipes Sicher & Lonnardi, Nuovi Tarsonemidce . 
9. T. cequipes Sicher & Leonardi, Nuovi Tarsonemidce. 
I have not been able to obtain this work, but Berlese says that 
T. brevipes was found in company with T. floricolus. 
10. T. intectus Karpelles. I have not seen the description of this species 
which is said to attack men in the Danube region. 
11. T. pallidus Banks, Proc. Ent. Soc. Washington, iv., 294. On greenhouse 
plants in America. 
12. T. lotus Banks. Causing galls on shoots of mango plants. 
