364 EXPERIMENT STATION RECORD. 



Ill clmiili'f 1 (pi'- r»(>-ir>T) (lie classification of the ticks is taken up, keys 

 [)0'wiX Kiven lor tlio s('i)aration of the genera and si)ecies. Under each genus 

 and species. l)il)liographical and synonj-mical references ai'e given, as ai"e also 

 the common names which have been applied. Descriptions are given of tlie 

 more important speci(>s with notes on their biology, distribution, and economic 

 imporlance. 



The DemodicidiG and AcaridiC (Sarcoptidie). ParasitidiB (Gamasidse), and 

 Tronihididii' arc briefly considered in the 8 concluding ])ages. 



The insect and allied pests of the hop, F. V. Theobald (Jour. Bd. Agr. 

 [London]. Hi (liWO), Nos. 7, pp. 555-571; 8, pp. 617-628, pU. 6 ).—" Forty-two 

 species only of true insects or hexapods have been found feeding on the hop 

 in Britain, but of these only 7 are of any general importance, namely, three 

 kinds of wireworm. or larval click beetles, the hoi> aphis (Phorodon hitmuU), 

 the strig maggot ( Diplo.si.s hiinmli), the clay-colored weevil {OtiorhyiuhuH 

 picipes), and the frog hopper or .lumper {Fjiuicanthus interrupt us). Others, 

 such as the needle-nosed hop bug (Calocoris fulvomaculattis), fever flies 

 (Bibionids), otter moth (Hcpialus humuli), etc., are of only occasional and 

 local importance, and several recorded here are isolated attacks only. Only 

 one acarid occurs in sufficient numbers to do any harm, namely, the hop red 

 spider {Tctranuchux atthxva). Two millepedes are found in hop roots, but 

 some growers still doubt if they are the cause of disease, and say they follow 

 upon it. 



"One very important hop pest is the eelworm (Heterodera scliachtU), caus- 

 ing 'nettle-head.' It is probable also that the common eelworm {Tylenchus 

 devastatrix) plays some important part in the dying back of hops. ... In 

 all cases of Tylenchus attack in hops which I have seen in recent years the 

 fungus Fusoma parasitica has been present, and it is a question whether the 

 latter is the direct cause of disease or whether the eelworm makes the plant 

 susce])tible to this fungus." 



Hop insects, F. Remisch (Ztschr. Wiss. Insektcnhiol., ', (190S), Nos. 8-9. 

 pp. 331-333; 10-11, pp. 363-368). — A brief account of the insects affecting hops 

 in the region about Saaz. Austria. 



[Rice pests in India] (Dept. Agr. Bengal, Quart. Jour., 2 (1909), No. Jf, pp. 

 290-292). — An abstract from the assistant entomologist's report of a tour in the 

 Nadia district of India in seai'ch of rice pests. 



Animal enemies and diseases of the sugar beet, A. Stift (Bl. Zuoker- 

 riihvnhdu. 16 (1009). Nos. 3. pp. 35-39; 5. pp. 73-77). — The literature issued 

 during 1908 relating to the insect and other animal pests and to the diseases of 

 the sugar beet is here reviewed. 



Enemies of the orchard, A". Vermorel (Prog. Agr. et Vit. (Ed. VEst-Centre), 

 30 (1909), Xos. 9. pp. 263^68; 11. pp. 316-319; 12, pp. 361-365; 13, pp. 393- 

 396; 15, pp. li61-Ji6Ji, figs. 8). — Insects attacking the pear and apple and meth- 

 ods of combating them are here discussed. The species considered are the 

 brown-tail moth, the gipsy moth, Bombyx neustria, Hyponomeuta malinella, H. 

 cognatcUa, Cficimatobia hrumata. codling moth, Cecidomyia nigra, and Anthono- 

 mus pomorum. 



Coffee and tea pests, R. D. Anstead (Indian Planters Gaz., 52 (1909), No. 

 12, pp. .'i22. 'i23). — A report of the coffee and tea pests following a tour of in- 

 vestigation through the Nilgiris. 



The fauna of the cacao field, J. H. Hart (West India Com. Circ, 2Jt (1909). 

 No. 291, pp. 557-561, figs. 2). — Thirty-four of the insects and mammals that 

 occur in cacao fields in the West Indies are note^l, mention being made of the 

 nature of the injury caused and of the remedial treatment. 



