CERAMBYCID^E 259 



3 Last dorsal segment ( 9 ) rapidly narrowing from the very broad base 

 to the apex, which is obtuse though much narrower than in the 

 preceding; coloration and sculpture nearly similar, the body dis- 

 tinctly less stout. Length (cf 9 ) 13.0-14.5 mm.; width 3.8-5.1 mm. 

 Oregon (Clackamas Co.) obliterata Hald. 



Last dorsal ( 9 ) very much narrower at base, the sides much more gradu- 

 ally converging to the similarly obtuse apex; body similar in colora- 

 tion and sculpture but much smaller in size and with relatively 

 smaller head; antennae (9) shorter than in the two preceding; 

 occiput less steeply declivous to the neck; pronotum nearly as in 

 obliterata, less opaque and more strongly punctured than in per- 

 dnctor; last ventral (9) less impressed at apex. Length (cf 9 ) 

 11.0-12.5 mm.; width 3.3-4.0 mm. Idaho idahoensis n. sp. 



4 Prothorax testaceous, with a broad black discal area extending from 

 apex to base, the entire prosternum also black; pubescence through- 

 out much longer, paler and more distinct than in the preceding 

 three species; front more strongly produced; outer antennal joints 

 more strongly bicolored; pronotal punctures finer and denser, the 

 surface opaque; outer angle at the elytral apex more prolonged 

 posteriorly. Length (9) 14.0-15.7 mm.; width 4.3-5.0 mm. 

 California. Four exactly similar examples vitiosa Lee. 



Prothorax wholly black or with a testaceous vitta basally on the inflexed 

 sides and not appearing dorsally; body smaller in size and of much 

 narrower outline 5 



5 Last dorsal segment ( 9 ) strongly compressed and elevated basally, 

 probably however partially due to lateral shrinkage in the only female 

 example at hand, its entire surface finely, rather closely punctulate, 

 with the short hairs pale and very evident; thoracic base very broadly 

 and gradually lobed medially; elytral punctures more close-set 

 than in either of the two following, being separated by about twice 

 their diameters basally; head rather well developed, the eyes (9) 

 separated at the minimum by three times their width. Length 

 (cf 1 9 ) 11.0-12.0 mm.; width 3.5-3.8 mm. Washington State and 

 Idaho propinqua Bland 



Last dorsal segment not strongly elevated medially toward base and 

 with the punctures throughout very much sparser in minuscula 

 and with different pubescence in regularis; elytral punctures sparser, 

 separated basally by two to three times their diameters 6 



6 Body rather larger and stouter, with more elongate elytra, black, the 

 antennae and legs deep black throughout; sculpture, vestiture and 

 elytral coloration as in propinqua; head similar; antennae (9 ) much 

 longer, the outer joints not so abbreviated, the fourth joint relatively 

 longer; prothorax similar, except that the median lobe at the base 

 is relatively much narrower, being only a third as wide as the base; 

 elytra more rapidly cuneiform from the base; last dorsal segment 

 larger, broader at base, more rapidly cuneiform, the punctures 

 similarly numerous but with the hairs much more minute, less pale 

 and very inconspicuous. Length (9) 13.0 mm.; width 4.0 mm. 

 Locality unrecorded regularis n. sp. 



Body smaller and narrower; head ( 9 ) smaller and with the eyes separated 



