HEMIPTERA HETEROPTERA. 135 



17. Prostemma nigricans. 



Foera. Nigra, longi-subfusiformis ; caput longi-conicum, prothoracis 

 lobo antico paullo longius ; oculi valde prominuli ; antenna gracil- 

 limce ; pedes fulvi ; femora an tic a crassa ; alw anticce picecB. 



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

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

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

 Antenna? very slender, much longer than the head and the proihorax 

 together; first joint a little longer 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 proihorax a little more than twice 

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

 wings piceous. Length of the body 3h lines. 



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



18. Prostemma luteiceps. 



Fcem. Viridescente-nigra ; caput luleum, longi-conicum, prothoracis lobo 

 antico paullo longius ; anlennce picecf, capile el prothorace ad unnm 

 longiores, articulo \o luleo ; prothoracis lobus anticus margine antico 

 slrigaque lanceolata luteis ; scutellum luleum, fusco bipunctalum ; 

 pedes lulei ; corium lineis nonnullis liturisque exlerioribus luteis. 



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

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

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

 Antenna? 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 than the third. Fore lobe of the proihorax 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. Bales' collection. 



19. Prostemma ruficeps. 



Fcem. Nigra, nilens, selosa ; caput prothoracis margo anticus, scutellum 

 et venlris latera basi pedesque rufa; caput longi-conicum, prothoracis 

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

 slrigata ; mem br ana basi plagaque discali rufis. 



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

 fore border of the proihorax, scutelhnn, propectus, abdomen beneath at the 

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



