64 Journal New York Entomological Society. ivoi. xv. 



oval ; front tibise tridentate, the upper tooth further removed from the second than 

 the latter from the apical tooth ; claws cleft, the upper and lower part equal in width, 

 but the lower slightly shorter than the upper. Length 8 mm. 



Huachuca Mts. , Arizona. 



The distinguishing characters of this species are the strongly sin- 

 uated sides of clypeus, the distinct, but slightly obtuse hind angles of 

 thorax and the very short, sparse, pale hairs on elytra. 



Diplotaxis knausii, new species. 



Elongate, narrow, ferruginous, labrum prominent and very deeply emarginate. 

 Head densely and moderately coarsely punctate ; clypeal suture distinct at sides, 

 obliterated at middle ; above the clypeal suture a subtriangular, shallow, median 

 depression; clypeus reflexed in front and broadly emarginate, angles rounded, gence 

 not prominent, continuous with the clypeus. Thorax transverse, sides arcuate slightly 

 behind middle ; apical and basal angles obtuse ; surface on each side near front angles 

 slightly impressed and rather densely punctate at sides, punctures moderately coarse 

 and on the disk less densely placed than at sides. Elytra nearly one and a half times 

 as long as wide at base ; sides almost parallel ; costse feebly distinct and finely sub- 

 muricately punctate ; the punctuation between the suture and the first geminate row 

 of punctures confused, those between the first and second row forming almost regular 

 rows of punctures. Pygidium very coarsely and confluently punctate, propygidium 

 more feebly punctate in an apical transverse line. Labrum prominent, very deeply 

 divided. Mentum rather deeply emarginate. Front tibiae tridentate, the upper tooth 

 more distant from the second, than the latter from the first. Front tarsi subcom- 

 pressed ; first joint triangular, second and following elongate ; claws cleft, the lower 

 part slightly shorter than the upper. First and second ventral segment on each side 

 of middle with a more or less prominent elevation, which is irregularly striate ; third 

 with a very feeble elevation. Length 9 mm. 



Las Vegas, Nevada. 



This interesting and very distinct species is dedicated with pleasure 

 to Mr. Warren Knaus, to whom I am indebted for the single male. 

 The female, which is in the collection of Mr. Knaus differs from the 

 male in having slightly shorter hind tarsi, in being a little more robust 

 and having the first joint of front tarsi scarcely triangular. 



There will be no difficulty in distinguishing both sexes of knausii 

 from any known species by the prominent and deeply divided labrum, 

 the triangularly emarginate mentum, the distinct elevations on second 

 and third ventral segments and in addition the somewhat compressed, 

 triangularly dilated first joint of front tarsi of the male. 



Diplotaxis tarsalis, new species. 



Oblong-oval, ferruginous or piceus. Head not densely punctate, punctures not 

 coarse and well separated ; clypeal suture distinct, broadly arcuate at middle ; gense 

 not prominent, continuous with the clypeus ; clypeus densely and more coarsely 

 punctate than the head, sides and apical margin reflexed, the former feebly sinuate 



