LACTISTA.— TOMONOTUS. 169 



4. Lactista pulchripennis, Sauss. 



Lactista pulchripennis, Sauss. Prodr. (Edip. pp. 143, 144 (1884) l . 



Hab. Costa Rica, Cache (Rogers: 1 6 ). — Colombia 1 (H. II. Smith). 



A single female from Colombia in the collection of the Carnegie Museum is also 

 placed here. It was taken at Bonda, Dept. of Magdalena, at an elevation of 250 feet 

 above the sea-level. 



5. Lactista pellepidus, Sauss. 



Lactista pellepidus , Sauss. Prodr. (Edip. p. 144 (1884) \ 



Hob. Mexico, Presidio (Forrer), Jalisco (Schumann), Orizaba (II. H. Smith & F. I). 

 Godman), Valladolid, Temax, and Merida in Yucatan 1 (Gaumer). 



The insect referred to as Lactista pellepidus by Scudder and Cockerell (see Davenp. 

 Acad. Nat. Sci. ix. p. 31, t. 3. fig. 1) is Tomonotus aztecus, Sauss. The one described 

 by James A. G. Rehn as Lactista boscanus also seems to belong to Tomonotus aztecus 

 (see Proc. Acad. Nat. Sci. Philad. 1902, p. 721). 



TOMONOTUS, Saussure. 

 Tomonotus, Saussure, Rev. et Mag. Zool. xiii. p. 321 (1861) ; Thomas, Acrid. N. Amer. p. 211 

 (1873) (in part.) ■ Saussure, Prodr. CEdip. p. 96 (1884). 



The genus Tomonotus is confined chiefly to Mexico and Central America, but it is 

 also represented in the south-western portions of the United. States, where two of the 

 species cross over the international boundary-line in the arid regions. Two well- 

 marked forms are at present included : one of these has the antennae rather heavy and 

 flattened, and the upper carina of the hind femora suddenly lowered on the outer half; 

 the other has both the antennas and femoral carina normal. The following table will 

 aid the student in determining them : — 



Table for separating the Species of Tomonotus. 



A. Tegmina with their apices obliquely truncate. Head and pronotum 

 rather roughly granulose ; the scutellum of the vertex gently declivent, 

 wrinkled. Eyes smaller. Pronotum cristate or suberistate, decidedly 

 angulate in front. Wings some shade of red : the fuliginous band 

 following the border to the anal angle. Spurs of hind tibiae rather 

 unequal in length, those on the outer side the shorter. Antennae with 

 the joints flattened, thereby giving these members a decidedly heavy 

 appearance. 

 b. Pronotum strongly compressed, elevato-lamelliformly cristate, the 

 incision profound and oblique ; the anterior and posterior edges 

 both strongly angulated. Upper carina of hind femora suddenly 

 lowered beyond the middle. 

 biol. CENTE.-AMER., Orthopt., Vol. II., October 1905. Zz 



