-67- 



XYLOSTEUS Frivald. 



X. ornatiis Lee, S. M. C.,No. 264, p. 205. 



Length 14 mm. = .56 inch. Habitat. — Oregon. 



Black, head and thorax densely, elytra more strongly punctured, 

 each with two yellow marginal spots. The antennae are about three- 

 fourths the length of the body ( 9 ). The elytral spots are trans- 

 verse and directed towards each other in a diagonal direction, and 

 extend nearly one-half the breadth of the elytra. The genus is 

 hardly distinct from Centrodera. 



TOXOTUS SeaviUe. 

 This genus is sharply defined by the spurs of the hind tibice, 

 which are inserted at the base of a deep excavation instead of (as 

 usual) at the extreme encL The species are quite similar in torm, 

 and all of considerable size. The thorax is constricted before and 

 behind, and tuberculate at the sides; the tubercle varies from a large 

 acute process in Schaianii, to an obtusely rounded, scarcely e\ident 

 form in ohtusus. The elytra are sinuate at anterior third (not strongly 

 in cinnaDwpterus), and are usually obliquely truncate at tip. The 

 differences between the sexes are often quite marked, besides the 

 greater length of the antennae in % . In Schawnii the 9 is very 

 much larger, and in vittiger, virgatus, vestitiis and obtusus, the ab- 

 domen is ferruginous in %> , and wholly or partly dusky in 9 . The 

 species may be separated by the following table, which has been 

 corrected by Dr. Horn: 



Synoptic Table of Toxotus. 



Elytra at apex obliquely truncate. 

 Third joint of antennae very decidedly longer than fourth. 



Elytra unicolorous, black; body either yellow, or black; legs bicolored. 



Schaumii. 

 Elytra rufo-testaceous, often varying to black; legs unicolored. 

 Eyes larger and more coarsely granulated; elytra not at all costate. 



cinnamopterus. 

 Eyes smaller and less coarsely granulated; elytra vaguely costate. 



vestitus. 

 Elytra bicolored, vittate. 



Black, with basal, lateral and apical margins broadly rufo-testaceous; 



legs pale nuMer. 



Black, with marginal and discal vittse yellow. 

 Discal vitta not reaching apex; species of larger size and robust fades. 



flavolineatu?. 



Discal vitta entire; species smaller and of slender facies . trivittatus. 



Rufo-testaceous, with sutural and discal black lines enclosing broad, 



golden, pubescent vitta virgatus. 



