HEMIPTERA HETEUOPTERA. 135 



17. Prostemma nigricans. 



Fcem. Nigra, longi-subfusiformis; caput longi-conicum, j>rothoracis 

 lobo antico pau/lo longius ; oeuli valde prominuli ; antenna graeil- 

 limce ; pedes fulvi ; femora antica crasia ; alee anticce pievce. 



Female. Black, elongate-subfusiform. Head elongate-conical, a little 

 longer than the fore lobe of the prothorax ; ante-ocular part more than 

 twice as long as the post-ocular, which is very short. Eyes very prominent. 

 Antennae very slender, much longer than the head and the prothorax 

 together; first joint a little louger than the ante-ocular head ; second about 

 twice as long as the first; third as long as the second ; fourth about twice 

 as long as the third. Fore lobe of the prothorax a little more than twice 

 as long as the hind lobe. Legs tawny ; fore femora incrassated. Fore 

 wings piceous. Length of the body 3^ lines. 



a. Amazon Region. From Mr. Bates' collection. 



18. Prostemma euteiceps. 



Fcem. Viridescente-nigra ; caput luteiim, longi-conicum, prothoraeis lobo 

 antico paullo longius ; antenna picece, capile et prothoraee ad unum 

 longiores, articulo lo luteo ; prothoraeis lobus anticus margine antico 

 strigaque lanceolata luteis ; scutellum luteum, fusco bipunctatum ; 

 pedes lulei ; corium lineis nonnuliis lilurisque exterioribus luteis. 



Female. Greenish black, smooth, shining, fusiform. Head luteous, 

 elongate-conical, with a well-developed neck, a little longer than the fore 

 lobe of the prothorax ; ante-ocular part full twice as long as the post-ocular. 

 Antennas piceous, somewhat longer than the head and the prothorax 

 together; first joint luteous, a little shorter than the ante-ocular part of the 

 head ; second more than twice as long as the first; third shorter than the 

 second ; fourth shorter lhau the third. Fore lube of the prothorax a little 

 less than twice as long as the hind lobe, luteous on the fore border and 

 with a luteous lanceolate streak from thence to the disk. Scutellum luteous, 

 with a brown point on each side of the disk. Legs luteous. Corium with 

 some luteous lines and with some exterior minute luteous marks. Mem- 

 brane blackish. Length of the body 3£ lines. 



a. South America. Presented by E. Doubleday, Esq. 



b. Tapayos. From Mr. Bates' collection. 



19. Prostemma ruficeps. 



Fcem. Nigra, nitens, setosa ; caput prothoraeis margo anticus, scutellum 

 et ventris latera basi pedesque rufa; caput longi-conicum, prothoraeis 

 lobo antico aquilongum, articulo lo rufo ; femora antica sublus uigro 

 strigata ; membrana basi plagaque disculi rujis. 



Female. Black, slender, smooth, shining, setose. Head, rostrum, 

 fore border of the prothorax, scutellum, propectus, abdomen beneath at the 

 tip aud on each side of the base and legs ted. Head elongate-conical, as 



