378 PHYTOPHAGA. 



near the posterior margin, the latter slightly depressed in front of the hlack impunctate scutellum ; elytra 

 wider than the thorax at the base, slightly but distinctly dilated posteriorly, the basal portion raised and 

 bounded behind by a depression, surface very closely and rather distinctly punctate-striate, the punctuation 

 more strongly impressed on the anterior than on the posterior portion. 



Eab. Guatemala, Calderas 6000 feet, San Geronimo, Zapote (Champion). 

 Easily separated from the preceding species by the impunctate head and distinct 

 carina. 



3. Palseothona longicornis. (Tab. XXII. fig. 7.) 



Below black ; head, thorax, legs, and basal joints of the antennas pale fulvous ; elytra closely and finely punctured, 

 metallic greenish-aeneous. 



Length 1| line. 



Head irregularly punctured near the inner margin of the eyes, the interstices somewhat rugose ; frontal 

 tubercles very short and indistinct ; carina entirely absent ; antennas extending nearly to the end of the 

 elytra, the first, third, and following joints very elongate and slender, the three or four lower joints pale 

 fulvous, the rest piceous or black j thorax transverse, of equal width, the anterior angles not produced, 

 the sides rounded at the middle, posterior margin sinuate and with an obscure depression in front of the 

 scutellum, surface entirely impunctate ; scutellum black ; elytra with the base moderately but distinctly 

 raised and the shoulders prominent, of a metallic brassy-greenish colour, closely and distinctly but finely 

 punctured ; anterior part of the breast and the legs entirely fulvous. 



Eab. Guatemala, Zapote, Las Mercedes, Chiacam in Vera Paz (Champion). 



The long antennae and the colour of the legs and of the elytra readily separate this 

 species from P. guatemalensis. 



4. Palseothona unicostata. 



Black ; head, thorax, base of the antennas, and the four anterior legs fulvous ; head rugose, the middle portion 

 raised ; thorax impunctate ; elytra very closely punctured, metallic blue, the sides with a single costa 

 from the shoulder to the apex. 



Length l|-lg line. 



Head with the middle of the vertex longitudinally raised, the space near the eyes rugosely punctured ; frontal 

 tubercles short but strongly raised ; carina indistinct ; antennas more than two thirds the length of the 

 body, the three or four lower joints fulvous, the rest black ; thorax transverse, the posterior margin 

 sinuate and depressed in front of the scutellum, surface impunctate, shallowly and transversely depressed 

 near the base ; scutellum black ; elytra with the base but slightly raised, metallic blue, more closely and 

 rather more distinctly punctured than in the preceding species, with a strongly raised costa extending from 

 the shoulder to within a little distance of the apex ; posterior legs piceous or obscure dark fulvous, the 

 others entirely of the latter colour. 



Hdb. Guatemala, Chiacam in Vera Paz (Champion). 



5. Palseothona semifulva. 



Fulvous ; antennas (their three basal joints excepted) and the apices of the posterior femora black ; thorax 

 impunctate ; elytra metallic dark blue, punctate-striate. 



Length l^-lj line. 



Head impunctate ; frontal tubercles very indistinct ; carina short and thick ; antennas elongate, the third 

 joint more than twice as long as the second ; thorax twice as broad as long, the sides moderately rounded, 

 the angles distinct but not produced, surface entirely impunctate ; scutellum fulvous ; elytra with a very 



