PANCHLOKA. 91 



fixed as regards their position, but one or the other may be accidentally wanting. The 

 dots are disposed as follows : (a) two typical dots beyond the middle — one on the furca- 

 tion of the discoidal vein, the other more distal on the median vein ; (b) a dot on the 

 principal vein (vena humeralis) near the base of the elytra; (c) 1-4 small spots between 

 the branches of the ulnar veins at the base of the ulnar areas, at a short distance from 

 the anal vein. There is also often a black line on each side of the pronotum, and some- 

 times one on the anal vein. 



These characters appear to be somewhat variable, but they are the only ones we have 

 been able to use to distinguish the lacteous species ; it is therefore not improbable 

 that the number of species here catalogued may have to be reduced when more speci- 

 mens of some of them are available for examination. 



The genus Panchlora seems to be exclusively American, but its species are very 

 cosmopolitan, being spread over the warm parts of the continent, and are likely to 

 become more widely distributed by being carried in merchandise from one country to 

 another. For this reason, and also on account of the great resemblance of some of the 

 species, we are obliged to enumerate them all. 



Synopsis specierum. 



1. Pronoti discus lsevigatus, vel impressionibus obsoletis notatus. 



a. Species lacteo-virescentes (thalassinse), elytris subhyalinis, vel basi coriaceis, in desiccatis 

 frequenter cano-fulvescentes. 

 b. Antennae lutese (vel in desiccatis rufescentes) . 

 c. Elytra immaculata. 



d. Ultimum segmentum ventrale ? distincte incisum. 



e. Lamina supra-analis $ ultimum segmentum ventrale vix superans. 



/. Pronoti margines pellucentes. Vertex inter oculos plus minus angustus. 

 g. Oculi in vertice fere eorum latitudine distantes. Ultimum segmen- 

 tum ventrale ? leviter sinuatum. Statura minor. — 1. thalassina, 

 sp. n. 

 gg. Oculi in vertice maxime propinqui. Ultimum segmentum ventrale 

 $ incisum, bilobatum ; $ lamina supra-analis prominula, valde 

 trigonali-incisa. — 2. exoleta, B. 

 ff. Pronoti margines et elytrorum margo costalis opaci. Oculi invicem 

 remoti. (Elytra sat coriacea.) — [3. glauca, Sss.] ; [(?4. antillarum, 

 Sss.)]. 

 ee. Lamina supra-analis ? prominula, bilobata. 



/. Oculi $ eorum latitudine remoti. — 1. thalassina, sp. n. 

 ff. Oculi magis approximate — 5. virescens, Th. 

 dd. Ultimum segmentum ventrale ? haud incisum. 



e. Minuta. Oculi subcontigui. (Ultimum segmentum ventrale ? truncation. 

 Lamina supra-analis $ haud prominula.) — [6. viridis, B.] 



Nn2 



