TENTH aEPOET OF THE STATE ENTOMOLOGIST 487 



Myriapods and Mites ia " Scabby " Potatoes. (Country Gentle- 

 man, for April 27, 18^3, Iviii, p. 329, cols. J, 2 — 37 cm.) 



Potatoes from Scarsdale, N. Y., show numerous deep cavities which con- 

 tain many "thousand-legged" worms, of the species known as Julus 

 cceruleocinctus Wood, which is at times quite injurious to potatoes. Neither 

 they nor wire-worms nor earth-worms or mites cause the "scab" with 

 which they are often associated, but are drawn to it as an attractive feeding 

 ground. The "scab" is caused by the fungus Oospora scabies Thaxter; 

 bacteria presence sometimes accompanies it. Five of the best preventives 

 of the scab are named. Tliousand-Iegged worms are difficult to contend 

 with; perhaps gas-lime or kainit may arrest their injuries. Mites also 

 occupied the cavities with the Julidce, perhaps referable to Rhizoglyphus 

 phylloxerce. Another instance of its occurrence cited, as also of other 

 species of mites at another time . 



[Extended in pages 445-449 of this Report (x) . ] 



Spraying for Codling-Moth. (Country Gentleman, for April 27, 

 1893, Iviii, p. 329, c. 2, 3 — 19 cm.) 



In reply to questions — spray soon after the blossoms fall; a second spray- 

 ing may be made a week or two thereafter; is hardly necessary to spray for 

 the second brood of moths; the arsenites are preferable for the purpose to 

 other insecticides; ordinary soapsuds would not suffice — a sti'ong soap 

 solution might answer; tobacco solution could not be depended upon, but 

 it might repel oviposition. 



[Insects on Lettuce and Cabbage.] (Gardening, for May 1, 1893, 

 i, p. 264, c. 2 — 14 cm.) 



Replying to inquiries from Medical Lake, Washington: The caterpillar 

 injuring lettuce was probably Plusia siviplex; the one burrowing into the 

 heads of summer cabbage and causing wilting and rot, was probably Plusia 

 brassicai. The Plusias may be killed by air-slaked lime, or by pyrethrum 

 powder, or by hot water. 



The plant-lice on cabbage. Aphis brassicce, should be sprayed from tlie 

 under side of the leaves with soapsuds. 



The Clover-Hay Worm — Pyralis Costalis (Fabr.). (Country 

 Gentleman, for May 4, 1893, Iviii, p. 349, c. 1-3 — 70 cm.) 



Appearance of the cocoons; diversity in its scientific designation; features 

 of the Pyralidce; description of the moth and of the caterpillar; injuries not 

 reported from the insect in Europe; injuries recorded in the United States 

 by Walsh; life-history as given by Riley; additional information by Prof. 

 Webster; extent of its injuries to hay; feeds on timothj- and possibly straw; 

 preventives and remedies; farther study needed. 



