SCUDDER, — NORTH AMERICAN TRYXALIN/E. 53 



by a testaceous stripe, below which the lateral lobes are again iufuscated, 

 but ofteu enlivened below the middle jDOsteriorly by a more or less con- 

 spicuous oblique Havo-testaceous bar, sometimes merged in the lighter 

 color of the lowest portion ; disk of pronotum testaceous more or less 

 infuscated, the carinas usually flavous and the metazona with a triangular 

 black patch on either side. Tegmina surpassing the hind femora in both 

 sexes, more or less heavily flecked with fuscous, ranging from a nearly 

 uniform sprinkling throughout with fuscous dots to a regular series of six 

 or more quadrate fuscous blocks in the median area ; wings hyaline with 

 black veins. Hind femora considerably surpassing the abdomen, cinere- 

 ous or cinereo-testaceous, generally marked above with a median trian- 

 gular black-edged brown spot and often also with less conspicuous basal 

 and postmedian fuscous patches, the geniculation more or less infuscated ; 

 hind tibiae pallid with a glaucous tinge and generally flecked more or less 

 conspicuously with fuscous, the base with a postgenicular infumated 

 annulus, the spines black-tipped. 



Length of body, $, 10.5 mm., 9, 18 mm.; antenna?, S, 5.2 mm., 9, 

 i^.b mm. ; tegmina, $^ 10.5 mm., 9, 15 mm. ; hind femora, S , 8.5 mm., 

 9 , 12.75 mm. 



89 $, 80 9 . Mesilla, N. Max., July 1 (Morse) ; and the following 

 from California : San Diego, July 22 (Morse) ; Coronado, July 24 

 (Morse); San Bernardino, July 16 (Morse); Cahon Pass, July 18 

 (Morse) ; Los Angeles, July 21 (Morse), Oct. 24 (Scudder) ; Altadena, 

 July 29, and Mt. Wilson, 2400', July 27 (Morse) ; Pasadena, Oct. 23 

 (Scudder) ; Santa Barbara, Oct. 21 (Scudder) ; Lancaster, July 31, 

 Aug. 1 (Morse) ; Tehachapi, Aug. 2 (Morse) ; Kern City, Aug. 4 (Morse) ; 

 Tulare, Aug. 5 (Morse) ; Monterey, Oct. 18 (Scudder) ; Raymond, Aug. 16 

 (Morse), and Ahwanee, Aug. 15 (Morse). 



At Mesilla, Mr. Morse found this insect common on sand and gravel 

 on the mesa, scarce on weeds and tall grass along ditches. 



Stirapleura tenuioarina sp. nov. 



Head not very prominent, the fastigium of the vertex moderately 

 narrow, deeply sulcate with elevated margins acutangulate in front ; 

 lateral foveolae almost exactly quadrate, barely longer than broad, dis- 

 tinctly impressed ; frontal costa pinched above, gradually enlarging 

 throughout and sulcate, though scarcely so at base and directly above the 

 ocellus, very sparsely punctate ; antennas a little shorter than head and 

 pronotum together. Pronotum not greatly constricted mesially, the 

 posterior margin broadly obtusangulate, a little rounded, the median 



