1170 



PAMIIA' LIII. — CIIRVS0MEL1D.1':. 



2167 (6907). (jfALERUCELLA DECOKA Say. Long's Second Exped., 11, 1S24, 

 29-1 ; ibid. I. 195. 

 Oblong, scjii'ccly wider Ix'liind, subdeprossed. Dnll yellow or dusky 

 brown elotbed with tine, short, yellow, silken pubescence; antennse wholly 

 piceous or with the l);is;il joints jiartly dull yellow; legs pale. Thorax twice 

 as wide as lung, narro\^•cr in front, sides curved, hind angles slightly promi- 

 nent, base oblique each side; disk with a vague median impression and a 

 large, shallow one each side, marked with piceous. Elytra scarcely widened 

 behind, surface coarsely, deeply and rather closely i>unctate. Length 4..")- 

 5.5 mm. 



Lake Cutaity ; scarce. .M;iy 21-.huK! 'MK (Jcciu's ou willow. Has 

 the same range as cacicollis ami. like it, probably confined to the 

 northern third of the State. 



216S (6912). (Jalerlcella luteoea Mull., Melanges Soc. Koy. Turin. 1766, 

 III, 187. 



Oblong, subdepressed. Dull olive or 

 greenish-yellow, tlnely pubescent; he;id 

 with a black spot on vertex and another 

 between the eyes; tlior.ix with three black 

 spots; elytra with :i stripe on sides and a 

 narrow, short line on middle of base, 

 black ; abdomen piceous. Thorax more than 

 twice as wide as long, slightly narrowed 

 in front; disk with an oblique depression 

 each side and a shallow pit on median line 

 near apex ; surface rather sparsely punc- 

 tate. Elytra with sides nearly parallel, 

 margins flattened, surface rather finely 

 and evenly punctate. Length .5-7 nun. (Fig. 

 510.) 



'JMiis is the injurious "eliu-l(>af 

 beetle,'' introduced from Europe into 

 the Tnited States near Baltimore 

 Fig 510. (.\fter Howard in Far. Bull. 99, a.bout 1S:^7. Since then it lias gradu- 

 ally sj)re:id southward and westward 

 and reached Ilarrisn]i ("ount>-, Indiana, about 11)05, probal)ly by 

 way of the Ohio River. It is abundant ou the elms of Laconia. 

 Elizabeth and Corydon in that county, from which the specimens in 

 the collection were obtained. The beetle liibernates as imago be- 

 neath bark, in cracks of wood and other shelter, and emerges to 

 feed on the first opening l)uds in spring. The eggs are laid in 

 clusters of five to 20 or more on the lower side of the elm leaves and 

 hatch in about a week. The larve t'eiil on tlu^ under side of the 

 leaf, gradually skeletonizing it. They teach full growth in 15 to 20 

 days, and then crawl or fall to the ground and change to pupti', 



