AULOCAEA. Ill 



b\ Tegmina and wings more than one-half as long as the abdomen. The 

 sides of the pronotum pale and generally provided with a large, dark 

 central patch 2. femoratum, Scudd. 



b 2 . Tegmina less than one-half the length of the abdomen; wings nearly 



or quite obsolete. Sides of pronotum less conspicuously marked . 3. brevvpenne, sp. n. 



1. Alllocara elliotti, Thomas. 



Stauronotus elliotti, Thomas, Proc. Acad. Nat. Sci. Phil. 1870, p. 82 (1870) \ 



(Edocara elliotti, Sauss. Prodr. (Edip. p. 79 (1884) 2 . 



Aulocara elliotti, Bruner, Canad. Ent. xvii. p. 10 (1885) 3 . 



Aulocara cceruleipes, Scudd. Bull. U.S. Geol. Surv. Terr. ii. p. 266 (1876) 4 . 



Aulocara deceits, Scudd. loc. cit. p. 267 (1876) 5 . 



(Edocara strangulatum, Scudd. Ann. Eeport U.S. Geol. Surv. West 100th Merid. p. 289 (1876) \ 



Hab. Noeth Ameeica 1-6 , Los Angeles and San Diego, California (Bruner). — Mexico, 

 mountains twelve leagues east of San Luis (Dr. Palmer), Villa Lerdo in Durango 

 (Bruner), Casas Grandes, Chihuahua (Br. Hughes). 



This is the most widely distributed species of the genus, and it is known to occur 

 from the north branch of the Saskatchewan Eiver in British America to the plains 

 of Central Mexico, and from the Mississippi River to the Pacific Ocean. In many 

 localities this insect and A. femoratum have frequently become sufficiently numerous to 

 materially injure the grasses on the cattle-ranges. 



2. Aulocara femoratum, Scudd. 



Aulocara femoratum, Scudd. Proc. Amer. Acad. Arts & Sci. xxxv. pp. 55, 56 (1899) \ 

 Aulocara decern, Bruner, Report Nebr. St. Bd. Agric. 1896, p. 129 (1897) (nee Scudder) 2 . 



Hab. Noeth Ameeica, Phoenix, Arizona (Kunze). — Mexico, Jimulco and Lerdo, 

 Durango (Bruner). 



Although the present species is less widely distributed than the preceding, it is 

 nevertheless a very common locust over much of the country lying west of the 100th 

 Meridian and south of the northern boundary of the United States. 



3. Aulocara brevipenne, sp. n. 



Zapata brevipennis, Bruner, antea, p. 103 ( $ , nee ? ) . 



"Very similar in general appearance to A. femoratum, Scudd., but much smaller and with more abbreviated 

 tegmina. Head rather small, the face very oblique, and the fastigium provided with strong carinae, which 

 meet in front in an acute angle. As compared with A. femoratum, this form has the pronotum lees 

 constricted at the last transverse incision, and the median carina less conspicuous. In colour it seems 

 to be more uniform greyish-brown, having none of the decided dark and light markings of A. femoratum. 



Length of body, d 1 , 12 ; of antennae 8, of pronotum 2, of tegmina 3, of hind femora 8-25 millim. 



Hab. Mexico, Comancho, Zacatecas (Bruner). 



The present species is based on a single imperfect specimen which was taken early 



