56 MIS'C. PUBLICATION 4 7 0, U. S. DEPT. OF AGRICULTURE 



along lateral margin : surface coarsely, densely, deeply punctate, rugose toward 

 sides, clothed with a few short, inconspicuous hairs, intervals indistinctly 

 granulose. 



Elytra distinctly wider than pronotum, three-fourths longer than wide, widest 

 behind middle ; sides slightly diverging from humeral angles to behind middle, 

 then arcuately converging to tips, which are separately broadly rounded ; lateral 

 margins coarsely serrate ; basal depressions deep ; humeral depressions shallow ; 

 disk more or less uneven, subdepressed ; surface coarsely, rather densely punc- 

 tate, sparsely clothed with short, inconspicuous hairs, the intervals densely 

 granulose. Each elytron with three or four more or less distinct longitudinal 

 costae, only the first strongly elevated posteriorly ; and with three densely punc- 

 tured foveae, the first between first and second costae, the second at end of 

 third costa, and the third near middle interrupting second costa. 



Abdcmen beneath sparsely, coarsely, irregularly punctate, sparsely clothed 

 toward sides with short, recumbent, whitish hairs, with smooth lateral callosities, 

 the intervals finely, densely granulose ; last visible sternite semicircularly 

 emarginate at apex, without a submarginal ridge, lateral margins coarsely ser- 

 rate ; eighth tergite triangularly emarginate at apex, densely granulose, coarsely, 

 sparsely punctate, but not longitudinally carinate. Prosternum coarsely, densely 

 punstate, sparsely clothed with long, recumbent, whitish hairs, with a broad, 

 short lobe in front. Anterior femur with a broad, obtuse tooth, which is coarsely 

 dentate on outer margin. Anterior and middle tibiae arcuate, the former with 

 a rounded dilation near apex; posterior tibia straight. 



Length 9.75 mm., width 4.5 mm. 



Redeseribed from the male lectotype, No. 3438. in the Academy of 

 Natural Sciences of Philadelphia. 



Female. — Differing from the male in having the head uniformly reddish 

 cupreous, the last visible sternite with a much smaller arcuate emargination 

 at apex, the eighth tergite subtruncate at apex, the anterior tibia unarmed near 

 apex, and the middle tibia straight. 



Type locality. — California. No definite locality. 



Distribution. — This species is widely distributed west of the Rocky 

 Mountains, where it is more common than the eastern femorata. Ma- 

 terial has been examined from Alberta. Canada, and Tarious localities 

 in the following States: Arizona. California. Colorado, Nevada, 

 Oregon, and Utah. It has also been recorded in the literature from 

 Minnesota, New Mexico, Texas, and Washington, and from Manitoba, 

 Canada, but no specimens have been examined from these regions, 

 and there is some doubt as to the identifications of some of the 

 specimens from which these records were taken. 



Hosts. — Chrysobothris mail attacks many kinds of deciduous trees 

 and shrubs and has been recorded in the literature from the follow- 

 ing hosts: Box elder {Acer negundo L.). silver maple {Acer sac- 

 chaHnum L.), red maple {Acer rubrum L.), bigleaf maple {Acer 

 macrophyUum Pursh). sycamore maple {Acer pseud oplat anus L.), 

 red willow {Salix laevigata Bebb), weeping willow {Salix babylonica 

 L.), white willow {Salix lasiolepis Bent.), Meyer's globular-headed 

 willow {Salix m-atsudana var. umbracidifera Rehd.). American elm 

 [Ulmus americana L.), Camperdown elm {Ulmus glabra var. camper- 

 doionii Rehd.), Huntingdon elm {Ulmus hollandica var. vegeta 

 Rehd.), Lombardy poplar {Popidus nigra italica Du Roi), eastern 

 cottonwood {Popidus deltoides Marsh.), California sycamore {Pla- 

 ianus racemosa Nutt.), Oriental plane {Platanus oriental is L.), 

 European horsechestnut {Aesculus hippocastanum L.), European 

 mountain ash {Sorbus aucuparia L.), copper beech {Fagus sylvatica 

 var. atropunicea West), California black oak {Quercus kelloggii 

 Newb.), coast live oak {Quercus agrifolia Nee), manzanita {Arcto- 

 staphylos tomentosa (Pursh) Douglas), alder-leaf mahogany 



