VO i889. n ] PROCEEDINGS OF THE NATIONAL MUSEUM. 59 



above; occiput with a rapidly widening median brown band; median 

 carina of the pronotum furnished with a similar baud commencing in 

 front with the carina alone, but spreading evenly posteriorly until cov- 

 ering the entire upper surface just before reaching the posterior ex- 

 tremity, where it changes to a bright rust brown. There is also a large 

 patch of this color down the sides of the pronotum in advance of the 

 last transverse impressed line, aud another on the sides of the head 

 back of each eye. Tegmina furnished with a row of rather large fus- 

 cous blotches along the posterior edge, also a few smaller ones along 

 the disk which vary in size and number in different individuals; wings 

 dull transparent green, with the principal veins and the cells on the 

 outer third of the posterior field fuliginous; anterior or humeral field, 

 with the veins greenish aud the cells clear. Sides of meso- and ineta- 

 thorax brown, inclining to black. Posterior femora with four broad fus- 

 cous bands, apex ferruginous ; tibia? furnished with a narrow basal an- 

 nulus of black, followed by a very broad one of greenish yellow ; below 

 this they are dull red, more or less infuscated at the apex and in the 

 middle, brightest in the male. Anterior aud middle femora brown, 

 banded in the middle with greenish. The most striking feature in the 

 coloration of this insect, and one which readily distinguishes it from 

 all other North American locusts with which I am acquainted, is a 

 series of pearly or bright silvery markings situated as follows: A 

 rather wide line commencing just below the lateral angle and following 

 down the front edge aud around the corner to the middle of the lower 

 edge of the pronotum ; a large-blotch upou the side just above the in- 

 sertion of the middle pair of legs, a third just below the base of the 

 wings, aud a fourth on the trochanter of the posterior legs. There is 

 also a very conspicuous one along each of the two metas.ternal carina? 

 mentioued above; besides these, each of the middle and posterior 

 femora has a rather conspicuous blotch of this color on the middle of 

 its outer face. Immersion in alcohol does not erase these. Antenmc 

 and tarsi ferruginous ; tibial spiues tipped with black. Eyes alternately 

 lined with perpendicular lines of yellow and brown. 



Length of body, $ , 19 mm , 9 , 23.5 mm ; of autenna?, $ , 7.75""' 1 , 9 , 

 4 mm . of prouotum, 6 , 3.92""", 9 , 4.5 mm ; of tegmina, $ , IS""", 9 , 19""" ; 

 of hind femora, $ , 11.75""", 9 , 12.35 mm ; of hind tibiae, $ , ll mm , 9 , 

 12""". 



Hab. — Arizona and El Paso, Texas, (G-. W. Dunn) ; Lerdo and Co- 

 mancbo, in the State of Durango, Mexico, duriug the mouth of Novem- 

 ber (Bruner). 



Described from numerous specimens of both sexes. 



This peculiar aud gaudily colored locust is entirely "arboreal" in its 

 habits, and lives upon a peculiar evergreen shrub (Ceanothus) among 

 the small smooth oval leaves of which it readily conceals itself. Dur- 

 iug the middle of the day wheu the sun shines hot it is very active, 

 and by jumping and flying from bush to bush easily eludes the pur- 



