70 



young adults cut short food tunnels in healthy cedar twigs. An important 

 secondary enemy and at times a primary enemy of arborvitse in Eastern 

 Canada. 



Host tree. Arborvitse. 



Distribution. Eastern Canada and Eastern United States. 



Phloeosinus dentatus Say; Acad. Nat. Sci. Phil. Jour., 5: 258, 1826; ed. Lee. 

 2:319. 



Host tree. Arborvitse. 



Distribution. Represented in our collection from Texas, Tennessee, 

 Virginia, Kentucky, Arkansas, Washington, D.C., and Massachusetts. 



Phloeosinus sequoiae Hopk.; U.S. Bur. For., Bui. 38, p. 33-35, fig. 1, pi. 12, 

 1903. 



A large dark species, 4 mm. long; probably the common larger Phloeo- 

 sinus of British Columbia cedar. (PL 15, fig. 7). 



Host tree. Giant Arborvitse in British Columbia, and Western United 

 States. 



Distribution. British Columbia Coast region, southwards to California. 



Phloeosinus serratus Lee.; Am. Ent. Soc. Trans., 2: 169, 1868 (Hylesinus) ; 

 Trans. Am. Phil. Soc. XV, 381, 1876. 



The front is concave and finely granulate-punctate; the pronotum is 

 densely, rather finely punctured, less finely than in utahensis', the elytral 

 interspaces are very wide, and finely densely rugulose, more strongly than 

 utahensis', the declivital serrations are coarse, very stout and blunt and 

 very closely placed. Allied to dentatus Lee. 



Known to me only through the type. 



Phloeosinus haagii Eichh.; Berl. Ent. Zeitschr., 148, 1868, (Dendroctonus) , 

 "Amer. bor."; Chapuis, Mem. Soc. Liege, 94, 1869, (Phlcsosinus) ", Leconte, 

 Proc. Am. Phil. Soc., XV, 436, 1876 (orig. desc. quoted). 

 Length, 2-5 mm., "Am. bor." Unknown to me. 



Phloeosinus graniger Eichh., same references. 



Length, 2 mm., Texas. Unknown to me. 



The Genus Leperisinus Reitter. 

 Bestimm. der Borkenkafer, 39, 1913. 



The genus Leperisinus was separated from Hylesinus Fabr. by Reitter 

 upon the following characters: wing covers gradually descending behind; 

 the venter of the abdomen elevated behind; the body scaly; the elytra 

 finely striate on the sides; the first two sternites truncate; the second much 

 shorter than the next two together; the tarsal furrow of the fore tibia long, 

 attaining at least to the middle of the tibia. It was made to contain 

 fraxini Panz., orni Fuchs, and wachtli Reitt., of which fraxini should be 

 taken as the type. The genus is quite distinct from Hylesinus and Ptelobius, 

 neither of which appears to be represented in our fauna. 



Key to the Species. 



A The antennal club oval; the pronotal and elytral colour markings trans- 

 verse, fasciatus Lee. Page 71. 

 AA The antennal club elongate-fusiform; the pronotal colour-markings longi- 

 tudinal, the elytral markings oblique, angulated or indistinct. 



