H. C. FALL. 61 



fourth and the basal half of the sixth elytral intervals ; scales broad 

 beneath on the sterna, sparse, narrow and hair-like on the abdomen. 

 Beak about one-half longer than the prothorax, rather finely but 

 closely subrugose punctate and dull almost throughout, the tip ieebly 

 shining. Head with non-contiguous elongate scales, frontal fovea 

 indistinct, eyes separated by a little less than the basal width of the 

 beak. Antennal funicle 7-jointed, first joint nearly as long as the 

 next three, second less than twice as long as wide and not much 

 longer than the third ; club fully as long as the five preceding joints. 

 Prothorax moderately transverse, sides gradually not strongly con- 

 vergent from the base, apical constriction very broad and feeble ; 

 punctuation moderately coarse and close. Elytra about one-fourth 

 wider than the prothorax, humeral angles narrowly rounded, sides 

 parallel in basal half, striae feebly impressed, moderately punctate, 

 intervals nearly fiat. Front thighs with a small acute tooth, middle 

 and hind thighs not evidently toothed ; front tibiae incurved at apex, 

 middle and hind tibiae nearly straight. Last ventral segment but 

 slightly longer than the preceding. Length, 2 mm. ; width, .9 mm. 



Type. — From Santa Rita Mountains, Arizona. 



This species must be near airvipes, but the latter accord- 

 ing to description has an ill-defined subdenuded patch at sides 

 of elytra posteriorly, and the middle thighs obviously toothed. 

 The hind tibiae are also said to be curved in both sexes of 

 curvipes, but this seems very unlikly, and I strongly suspect 

 that Dietz's specimens are all cf 's. 



Since writing the above I have seen the Dietz Collection 

 and find there two examples of airvipes. The first, bearing 

 the label and best fitting his description, and hence to be re- 

 garded as the type, is from Nevada. The subdenuded area 

 called for by the description is scarcely evident, and I could 

 not make out the tooth of the middle thighs ; if present it 

 must be very small. There is no reliable indication of sex 

 in this specimen except the rather strongly curved hind tibiae, 

 which in all other instances known is characteristic of the cf; 

 nevertheless I believe this specimen to be Dietz's supposed 

 9 . The second example is an undoubted c? from New 

 Mexico. It is more densely scaly, the antennae inserted dis- 

 tinctly beyond the middle of the beak, form a little narrower, 

 sides of prothorax more incurved at base, hind tibiae barely 

 as strongly curved. In the Nevada type the antennal inser- 

 tion is less apical, being at about the middle of the beak, 



TRANS. AM. ENT. SOC. , XXXIX. 



