V0 1889." : ] PROCEEDINGS OF THE NATIONAL MUSEUM. 63 



Length of body, <J , 12 mm , $ , 18""" ; of antenna-, & , 6.2 mm , 9 , 4.5""" ; 

 of pronotuui, $ , 2.15""", 9 , 2.85""" ; of tegrniua, $ , ll 1 ""', 9 , 13.25""" ; 

 of bind femora, S , 8 1 "" 1 , 9 , 9.5""". 



Hab. — Laramie Kiver, just inside of tbe Colorado Hue during early 

 July, at au elevation of about 8,000 feet above sea-level (Bruuer). 



This is one of tbe few of our North American locusts tbat is known 

 to have a particular food-plant. In this instance the plant is Eurotia 

 lanata or the sweet sage of the West, which is also known as "winter 

 fat" and several other local popular names. It certainly is an inter- 

 esting fact to know that Mestobregma pidchella, a species found in quite 

 a different region, that is also partial to the same food-plant is likewise 

 similarly marked — showing tbe tendency of mimicry in color between 

 an insect and its surroundings. 



Arphia Saussureana sp. nov. 



Small and rather slender; with the wings bright vermillion, wbich 

 with the general appearance at the first glance reminds one of a dimin- 

 utive A. tenebrosa Scudd. 



Vertex between the eyes broad, tbe sulcus broadly pyriform and fur- 

 nished with a strong median longitudinal carina which is severed in the 

 middle by a deep transverse arcuate depression ; bounding walls rather 

 prominent; occiput rugulose, with two quite large semi-triangular de- 

 pressions, one on either side of a slight median carina; frontal costa 

 broad, a trifle expanding at the ocellus, very coarsely granulated and 

 punctate throughout, slightly sulcate in the male with a heavy median 

 carina reaching from the fastigium to tbe ocellus; anteniue rather 

 heavy, a third longer in the male than the female. Disk of the prouo- 

 tum tuberculate, the median carina subcristate, notched about the mid- 

 dle by the last transverse impressed line; posterior angle nearly 

 square. Tegmiua of medium width, reaching ( 9 ) or extending nearly 

 one-third of their length beyond the tip of the abdomen ( $ ). 



General color dull brown, heavily mottled with dark brown aud dull 

 black. Wings bright vermillion or roseate, with the outer third aud a 

 rather broad tapering ulnar ray reaching nearly to the base dark fulig- 

 inous. Posterior femora obscurely faciate with fuscous; the tibiae 

 with a wide basal an mil us of dull testaceous, remainder more or less 

 iufuscated. 



Length of body, $ , 15.75 1 " 1 ", 9 , 21""" ; of antennae, $ , G""'\ 9 , 4.25'""' ; 

 of pronotuui, S, 3.50""", 9, 4.5"""; of tegmina, $ , 16""", 9,18"""; of 

 hind femora, 5,10""", 9 , 11""" ; of hind tibiae, 5,9""", 9, JO""". 



A large series of both sexes. 



Hab.— On the hills lying back of San Francisco, Cal., during the 

 latter part of October (Bruner, Koebele). 



Aulocara Scudderi sp. uov. 

 About the size of A. decern Scudd., froiu which it differs in its more 

 robust form aud in having the posterior tibiie red instead of blue. 



