NATURAL SCIENCES OF PHILADELPHIA 89 



nerly. The basal spot of the margin is concealed in a dorsal view by the 

 prominent shoulders, within which the disc is obliquely impressed. The tho- 

 rax is nearly as in L. v a g a n s , but the form of the elytra is very different ; 

 the species belongs in the neighborhood of L. p u b e r a Say. The subsutural 

 spot forms with the posterior lateral one a transverse band stretching forwards 

 along the suture : there is sometimes also a scutellar yellow spot. 



35. L. lsetifica, nigra opaca, pube erecta nigra brevi parce vestita, capite 

 thoraceque confertissime punctatis, hoc antrorsum sensim angustato, latitu- 

 diue baseos vix longiore, lateribus late rotundatis, angulis posticis vix pro- 

 minulis, disco postice subimpresso, ad basin marginato, elytris thorace latiori- 

 bus, vix triangularibus, laete coccineis opacis, antice fortiter, postice subtilius 

 punctatis, gutta quadrata prope suturam ante medium, alteraque versus mar- 

 ginem ad medium, nonnunquam deficientibus, margineque apicali nigris ; pos- 

 tice paulo dehiscentibus ad apicem truncatis, angulo externo acuto, suturis 

 veutralibus rufo-piceis. Long. *43. 



Shoalwater Bay, Dr. Cooper; Washington Territory, Mr. Gibbs. The anten- 

 na} are entirely black, subserrate and slightly thickened towards the tip, 

 extending to the anterior fourth of the elytra. Tbis species may be placed 

 between the groups of L. canadensis and L. vagans. 



36. Leptura sanguinea, nigra, opaca, pube erecta parce vestita, capite 

 thoraceque confluenter dense punctatis, hoc ante medium antrorsum sensim 

 angustato, latitudine paulo longiore, lateribus rotundatis, utrinque vix con- 

 atricto, angulis posticis vix prominulis, elytris thorace latioribus, triangulari- 

 bus, lsete rufis, confertim punctatis, postice paulo dehiscentibus, apice oblique 

 truncatis et nigro-marginatis.. Long. - 4. 



W. Territory, Mr. Gibbs. Allied to the preceding, but differs by the thorax 

 being less narrowed in front, and the elytra much more closely punctured. 

 The male has the thorax narrower and the outer margin of the elytra blackish. 



37. Leptura dehiscens, minus elongata, nigra pube parca fulva erecta 

 antice vestita, capite thoraceque dense fortiter punctatis, hoc convexo, lateri- 

 bus valde rotundatis, antice multo angustiore, apice marginato, basi trans ver- 

 sim impresso, elytris postice subangustatis obscure rubris, confertim puncta- 

 tis, sutura postice rotundata valde dehiscente, apice haud acuto infuscato. 

 Long. "5. 



Oregon, Dr. Suckley. Allied to L. vagans, but with the punctures 

 smaller and more dense, the elytra less triangular and not acute at apex : the 

 antenna? are entirely black. 



38. L. lugens, elongata nigra, opaca, capite thoraceque confertissime punc- 

 tatis, pube brevi erecta parce vestitis, hoc latitudine longiore antrorsum sen- 

 sim angustato, lateribus late rotundatis, ante basin transversim vix sulcato, 

 angulis posticis paulo prominulis, elytris thorace latioribus, humeris subeleva- 

 tis a basi postice paulo angustatis, postice dehiscentibus, et ad suturam rotun- 

 datis, angulo externo distincto, antice fortiter, postice subtilius punctatis, 

 antennis corpore paulo brevioribus. Long. "42. 



Shoalwater Bay, Dr. Cooper. This species might be placed near L. 

 nigrella, but the posterior angles of the thorax are hardly visible, the 

 humeral parts of the elytra are more prominent, the elytra are more dehis- 

 cent and the sutural angle altogether rounded. 



39. Syneta suturalis, fusea, capite thoraceque dense rude punctatis, 

 hoc lateribus bisiuuatis, ad medium unidentatis, antice posticeque margine 

 lato pallido ornato, elytris albis, sutura infuscata, seriatim punctatis, anguste 

 marginatis, costis duabus parum elevatis intermediaque vix distincta, antennis. 

 ore pedibusque pallide testaceis. Long. -23. 



Puget Sound, Mr. Davidson. A very distinct little species, with only a sin- 

 gle lateral thoracic tooth. 



1859.] 



