[85] Report of the State Entomologist. 227 



Professor Smith recommends very highly a tobacco-dust prepara- 

 tion known as X. 0. Dust and manufactured by the Insecticide Manu- 

 facturing Co., at 10 East Camden street, Baltimore, as safe in use and 

 prompt and efficient in action. He asserts: "If thoroughly applied 

 so as to get the hair well dusted, no Stomoxys or Ecematobia can stand 

 it long enough to puncture the skin of the cattle. It would mean 

 death to them. The powder does not lose strength by exposure." 



But the best way to meet the insect, would, in all probability, be to 

 destroy it in its earlier stages by applying lime to the droppings. If 

 this be done on successive mornings, the eggs would be killed before 

 their hatching and entering the manure as maggots. The suggestion 

 of Mr. Howard is therefore valuable — to prevent the insect surviving 

 the winter by liming the dung in the autumn where the cattle fre- 

 quently stand at night. It being here that the eggs are deposited 

 and where by far the larger number of the insects will probably hiber- 

 nate, if the liming be done so thoroughly as to be carried or trod- 

 den into the droppings, it certainly should destroy all the horn-flies 

 in its early stages that might otherwise survive the winter. 



Dynastes Tityus (Linn.). 



The Spotted Horn-bug. 



(Ord. Coleoptera: Fam. Scarab^eid^:.) 



Linnaeus: Syst. Nat, ii, 1767, p. 542, No. 5 (Scarabceus Tityus). 



Fabricius: Syst. Ent., viii, 1775, p. 18; Sp. Ins., i, 1781, p. 8, No. 23 {Scara- 

 bceus); Ent. Syst., Pt. i, 1792, p. 10, No. 25; Syst. Eleuth., i, 1801, p. 

 10, No. 28 (Geotrypes). 



Say : Amer. Entomol., i, 1824, p. 8 ; Compl.Writ., i, 1883, p. 8, pi. 4 (Scarabceus). 



Fitch : 3d Kept. Ins. N. Y. (3d-5th Repts.), 1859, p. 49, No. 72. 



Glover : in Kept. Commis. Agricul. for 1868, p. 89, f. 80. 



Riley: in Amer. Entomol., ii, 1870, p. 374, f. 224. 



Horn : in Trans. Amer. Ent. Soc., iii, 1870, p. 78 (var. Grantii). 



LeBaron : 4th Rept. Ins. 111., 1874, p. 84, f. 38. 



Thomas : 6th Rept. Ins. 111. [1877], p. 96, f. 7 (description). 



Lintner: in Count. Gent., xlvii, 1882, p. 645; in id., 1, 1885, p. 623. 



Dimmock: in Cassino's Stand. Nat. Hist., ii, 1884, p. 368, f. 427. 



Johnson: in Bull. No. 4, Divis. Entomol., IT. S. Dept. Agricul., 1884, p. 78. 



Henshaw: ListColeop. N. Amer., 1885, p. 93, No. 5886. 



Smith : in Proc. Ent. Soc. Wash., i, 1888, p. 54 (its odor). 



Atkinson : Bull. No. 4, Agricul. Exp. St. Univ. S. Car., 1889, p. 87 (its odor). 



Webster : in Insect Life, ii, 1889, p. 89 (in Indiana). 



The following communication, under date of August second, from 

 a gentleman at Perrowville, Va., accompanied specimens of the above- 

 named beetle. The reply made thereto in the Country Gentleman of 



