FALL AND COCKERELL. 



255 



tie with short fine erect hairs. Last joint of maxillary palpi broadly 

 triangular, with the inner angle sharply defined in the male, more 

 narrowly triangular with the inner angle more or less rounded in 

 the female. The head is relatively wider than in any other species 

 of the genus now before me except octopunctata, being in the male 

 as wide as the elytra at base. 



.MORDELLISTEIVA. 



Of the fourteen species of this genus recorded in the preceding 

 list I have not personally seen the following from the territory : 

 aspersa, inornata, impatiens, angusta and cemula. With the possible 

 exception of impatiens and angusta I have no reason to doubt the 

 correctness of the references. Both impatiens and a7igusta possess 

 characters which should make them easily recognizable, and neither 

 could by any possibility, I think, be identical with any of the other 

 species of the present list. The genus might profitably be revised, 

 and when so done, special search should be made for other charac- 

 ters besides the so called tibial and tarsal ridges, which though of 

 very great value, must at times be used with caution. It is certain 

 that the palpi and antennse offer characters which can be used to 

 advantage. 



.nordellistena I'estiva n. sp.— Form and size of trifasciata and lepidula. 

 Yellow throughout, the elytra with black markings as follows: An elongate scn- 

 tellar spot; a small humeral spot connected along the base with the former; a 

 broad median black fascia interrupted at the suture, and a narrower subapical 

 fascia. Hind tibia with two strongly oblique, equal, parallel " ridges", extend- 

 ing half way across. Length 2 mm. 



Las Vegas Hot Springs (Barber and Schwarz). 

 Closely allied to trifasciaia and lepidula, in both of which, how- 

 ever, the elytral apex is always black. 



Mordellisteiia palleiis n. sp.— Pale yellowish testaceous, abdomen iu- 

 fuscate, except at apex ; antennae with outer joints dusky. Form slender, linear, 

 pubescence pale yellow. Antennse slender, fourth joint four-fifths as long as the 

 fifth, the latter evidently shorter than the third and fourth united. Terminal 

 joint of maxillary palpi not very strongly dilated, about twice as long as wide, 

 the outer edge shorter than the inner. Hind tibia with two rather short oblique 

 ridges, the upper slightly more oblique, and with trace of a third ridge; first 

 joint of hind tarsi with three ridges, the second with two. Length 3.3 mm. 



"Mesilla, July 31, at light" (Cockerell). 



Closely allied to tosta, the type of which is entirely pale, the 

 fourth joint of antennse about two- thirds as long as the fifth, the 



TEA.NS. AM. ENT. SOC. XXXIII. JULY, 1907. 



