70 Annals of the Carnegie Museum. 



Habitat: Las Juntas, Department of Santa Cruz, Bolivia, where it 

 was captured at an elevation above sea-level of 250 meters, in Decem- 

 ber, 1913, by J. Steinbach. C. M. Ace. No. 5060. 



Genus Adelotettix Bruner. 



Adelolettix Bruner, Horae Soc. Ent. Rossicte, XXXIX, p. 476 (1910); Ib., Ann. 

 Carnegie Mus., VIII, pp. 485-486, footnote (1913). 



This genus, as stated by me in these Annals (Vol. Will, p. 97), is 

 confined to neotropical America. At least three species have already 

 been described. A fourth appears now to be at hand. They may 

 be recognized by the subjoined key, which is a modification of one 

 prepared by me and appearing in the paper above cited. 



Synopsis of the Species of Adelotettix. 

 A. Tegmina rather sparsely veined, especially apically. 



b. Hind tibiae brunneo-testaceous, nine-spined on both edges. The pro- 



notum collared witli black. [Yucatan.] collaris Bruner. 



6&.'Hind tibiae more or less colored with vinaceous or red, fewer-spined 

 on both edges. 

 c. Hind tibiae with the basal half obscure cinereous, the apical portion 

 deep red. Pronotum not collared with black, wings vitreous, 



strongly infuscated apically obscurus Bruner. 



cc. Hind tibiae vinaceous red. Pronotum pale, bordered and collared 

 with black. Wings cerulean, but little infuscated apically 



[Cayenne] caruleipennis sp. nov. 



AA. Tegmina profusely veined, even on the apical half. Hind tibiae and tarsi 

 vinaceous red [Para, Brazil] brimneus Bruner. 



121. Adelotettix caeruleipennis sp. nov. 



Related to both collaris and obscurus, but distinct, as shown by 

 reference to the above key of species. Especially characterized by the 

 blue wings and the pale-bordered as well as pale-collared pronotum. 



Size above medium, rather robust, the front and cheeks below the 

 eyes rather closely, but not deeply, punctate; the pronotum and pleura 

 of meso- and metathorax strongly and profusely punctate. Head a 

 little wider than the anterior edge of the pronotum, the occiput rather 

 short and bulging; eyes large and prominent, about two-fifths longer 

 than the anterior margin of the cheeks, separated at the vertex by a 

 space a little greater than the diameter of the basal antennal joint, 

 somewhat depressed and gently sulcate; the fastigium of the vertex 

 not quite horizontal, a trifle longer than its basal width, longitudinally 



