248 Fiftieth Eeport ox the State Museum 



"The whole of the outer bark was removed from the elm (this may be 

 done conveniently by a scraping-knife shaped like a spoke-shave). This 

 operation caused a great flow of sap in the inner lining of the bark (the 

 liber) and the grubs of the Scolytus beetle were found in almost all cases 

 to perish shortly after. The treatment was applied on a large scale, and 

 the barked trees were found, after examination by the commissioners at 

 two different periods, to be in more vigorous health than the neighboring 

 ones of which the bark was untouched. More than two thousand elms 

 were thus treated." 



M. Robert had also obtained good results from cutting out strips of 

 the bark of old elms of about two inches wide from the boughs down to 

 the ground. " It was found that where the young bark pressed forward 

 to heal the wound and a vigorous flow of sap took place, many of the 

 larvae near it were killed, — the bark that had not entirely been under- 

 mined was consolidated, and the health of the tree improved." 



Crioceris 12-punctata (Linn.). 

 The Tiuelve-spolied Asparagus Beetle. 



(Ord. COLEOPTERA : Fam. CHRVSOMELIDyE.) 



LiNN^us: Syst. Nat., Edit, xii, i, pars ii, 1767, p. 601, no. no 



(description). 

 Lintner: ist Rept. Ins. N. Y., 1882, p. 244 (recently introduced); 8th 



do., 1893, p. 250 (mention) ; loth do., 1895, p. 517 (from 



Brighton, Monroe Co., N. Y.). 

 Riley: in Amer. Nat. for Feb. 1883, p. 199 (introduction); Bull 31 



Divis. Entomol., U. S. Dept. Agricul., 1893, p. 67 (listed). 

 Horn: in Canad. Entomol., xvi, 1884, pp. 183-184 (mention). 

 Riley-Howard: in Insect Life, iv, 1892, pp. 395-396 (occurrence in 



Maryland and District of Columbia). 

 Howard: in Insect Life, v, 1892, p. 98 (spreading slowly). 

 Smith : in Insect Life, v, 1892, p. 94 (in New Jersey); in id., vi, 1893, 



p. 191 (spread); in Rept. N. J. Agricul. Expt. Stat, for 1892, 



1893, p. 393 (spreading in New Jersey) ; in id. for 1893, 1894, 



pp. 444-445 (continues to spread); in Bull. 6 NewSer., Divis. 



Entomol., U. S. Dept. Agricul., 1896, p. 62 (spreading over 



entire State); Econom. Entomol., 1896, p. 212 (brief mention) ; 



in Entoniolog. News, viii, 1897, p. 18 r (in Monmouth 



Co., N. J). 

 Webster: Bull. 51 Ohio Agricul. Expt. Stat., 1894, p. 121 (mention). 

 Laurent: in Entomolog. News, v, 1894, p. 292 (mention). 

 Johnson: in Bull. 6 New Ser., Divis. Entomol., U. S. Dept. Agricul., 



1896, p. 65 (becoming quite common) ; in 9th Rept. Md. 



Agricul. Expt. Stat., 1896, p 225 (common and spreading). 



