208 Mr. Bl'tler on rariovs genera of the 



2. PolijgJupta costata. 



9 PoJi/gh/pta costata, Bnrmeister, Ilandb. Eut. ii, 1, p. 142, 1 ; 

 Silb. Eeviie Eut. iv, p. 177, 1, pi. 36, fi,ii-s. 5-7 (1836). 



$ PolygJijpta }yilosa, Fairm. Ann. Eut. Ser. 2, iv, p. 296, 2 

 (1846). 



Polyfjhjpta strlgata, Walker, List, Homopt. Supjal. p. 136 

 (1858)] 



$ , ? ]\Iexico. Brit. Mus. 



3. Poliigli/pta dorsalls. 



Polyglypta dorsalis, Biirmeister, Silb. Revue Eut. iv, p. 178, 

 2 (1836). 



var. Polyglypta niaculata, Biirmeister, I.e., u. 3 (1836). 



A'ar. Polyglypta pallipes, Burmeister, I.e., n. 4 (1836). 



Polyghjpta nlqella, Fairm., Ann. Ent. Ser. 2, iv, p. 298, 10 

 (1846). 



Mexico, Chiapas. Brit. Mus. 



I have associated the above on the authority of Dr. Stal, but 

 the three forms are readily separated ; P. pallipes, not only by 

 its black colouring, but the distinctly shorter, though variable, 

 anterior thoracic horn. 



4. Polyglypta lineata. 



Poli/glt/pta lineata, Burmeister, Sill3. Revue Ent. iv, p. 179, 

 4 (1836).' 



Polyglypta abbreriata. Walker, List Ilomopt. Suppl. ]i. 136 

 (1858). 



Mexico (Oaxaca). Brit. Mus. 



5. Polyglypta tridecim-costata. 



Polyglypta tridecim-costata, Fairm., Ann. Ent. Ser. 2, iv, 

 p. 299, 11 (1846). 

 Mexico. 



Greenish, with short anterior horn : thirteen carina?. 



6. Polyglypta. fusca, n. sp. PI. Ill, f. 3. 



Chocolate-bro\vn, coarsely punctured ; pronotum with four 

 lateral carina? ; anterior process (from the humeral angles) about 

 one-third the length of the entire insect, laterally compressed, 



