i8 University of MicJiigan 



we may trace here the steps in evoh:tioiiary differentiation, 

 consequent upon the severance of former paths of migration. 



Family TIXGIDAE 

 CorytlntcJia distincta Osborn and Drake. 



B. C. — Vernon, July ii, 1914 (M. H. R.), Sept. 27, 1918 

 (W. D.). 



Taken on hollyhock by Downes. In fresh specimens, with 

 colors dark and unfaded, the marginal spines are almost en- 

 tirely lacking, a condition characteristic of the species and not 

 due to accidental causes as Gibson suggests. Thus the status 

 of var. spinafa Osboni and Drake cannot be considered as 

 settled^*'. 



Corythucha canadensis sp. nov. 



]\Iembranous portions opaque white, some of the areoles 

 hyaline; disc of pronotum brown; posterior lobe of hood large- 

 ly brown, anterior lobe with narrow lateral brown stripes ; 

 paranota with two brown spots, of which the anterior is larger; 

 median carina with a brown spot ; lateral carinae and apex of 

 angulate process white. Hemielytra with distinct apical and 

 basal brown bands, the former broad, occupying one-third of 

 the hemielytra and enclosing several hyaline areoles, the latter 

 made up of separate spots on humeri and discal elevations; 

 costal margin with a small brown spot at middle. Antennae, 

 legs, and plates forming rostral groove reddish brown, the last 

 mentioned sometimes darker. Body piceous. 



Hood barely twice as high as median carina and slightly 

 longer than the carina, its height a little more than one half the 

 length of carina and equal to one half its own length, its width 



^•^ See Gibson, The Genus Corythucha Stal, Trans. Am. Ent. See, Vol. 44, 

 1918, p. 81. Consult -this paper for references to literature on the genus. 



