I'.runer : South American Locusts. 4C>5 



ff. Tegmina provided also with a subcostal pallid vitta 



[Bogota, Colombia] bivittata Gerstaecker. 



ee. Disk and base of tegmina marked with pale macula; or lunules. 

 ' Males with two circular white lunules in the disk toward 



the base [Colombia] bilunata Gerstaecker. 



ff. Base of male tegmina marked with a single pale lunule 

 or patch. 

 g. Tegmina provided on the disk near the base with a 

 single bright yellow, black-bordered spot [Vene- 

 zuela] jucunda Walker. 



gg. Tegmina provided at base on the costal margin with 

 an elongate ivory-white patch [Santa Cruz de la 

 Sierra, Bolivia] basalis sp. nov. 



69. Elaeochlora brachyptera sp. nov. 



Belonging in the section of the genus with E. trilineata, viridicata, 

 pulchclla, and arcuata, but most closely related to the last. It differs 

 from arcuata, however, in the somewhat shorter tegmina and wings, 

 and in having the lateral lobes of the pronotum colored more like 

 those in viridicata. 



Pronotum both arcuate and somewhat more strongly tectate than 

 usual in the species of the genus. Viewed in profile the median 

 carina is quite well arched and separated into lobes by the profound 

 transverse sulci. Head with the occiput a little elevated and rounded, 

 not embraced by the anterior margin of the pronotum to the same 

 extent as in its allies; fastigium of the vertex triangular, its sides 

 rather heavy and meeting in front, so as to form almost a rectangle, 

 the hind end of disk depressed transversely; eyes of moderate size and 

 prominence, separated at the vertex by a space equal to the greatest 

 diameter of one of them and the same as the length of the front margin 

 of the cheeks. Antenna fairly heavy and subensiform, somewhat 

 longer than the head and pronotum taken together, but not quite the 

 length of the hind femora. Frontal costa but little produced between 

 the antennae, its sides heavy and evenly divergent below, sulcate 

 throughout; when viewed in profile the front is rather oblique, but 

 almost straight; the facial carinse prominent and straight, as are also 

 the anterior margins of the cheeks, which are nearly parallel to the 

 latter and extend upwards along the front margin of the eyes as yellow 

 lines, which assist in inclosing a long, narrow, smooth area between 

 the facial carina? and the sides of the head. Pronotum quite strongly 

 rugose and tuberculate as in pulchclla, its anterior margin entire and 



