354 LIST OF HOMOPTEROUS INSECTS. 



20. Delphax luteivitta, Mas. 



Straminea ; caput anticum productum, conicum ; frons nigra stra- 

 mineo striata ; prothorax tristriatus, luteo hivittatus; abdomen 

 nigrum Jlavo fasciatum ; pedes fulvi ; aim limpidce. 



Body straw-colour: head produced in front, conical; crown 

 narrow in front, notched on the hind border, its length exceeding its 

 breadth ; front black, very narrow, bordered with pale straw-colour, 

 adorned with two ridges of the same colour which are united towards 

 the epistoma : fore-chest broader than long, three-ridged, adorned 

 with two bright luteous stripes: middle-chest small, triangular : ab- 

 domen black, obconical, not longer than the chest ; hind borders of 

 the segments pale yellow: legs pale tawny : wings colourless; veins 

 pale tawny : fore borders of the fore-wings darker towards the tips. 

 Length of the body f line; of the wings 2| lines. 



a. United States. Presented by E. Doubleday, Esq. 



21. Delphax substitua, Fem. 



Fusca ; thorax tricannatus ; mesothorax fulvo irivittatus ; abdo- 

 men apice fulvum; pedes fulvi ; alcB liinpidre. 



Body brown : head wanting : fore-chest with three ridges ; the 

 side pair diverging to the hind border, its length about one-fourth 

 of its breadth : three very slight almost parallel tawny ridges on the 

 middle-chest which is about thrice the length of the fore-chest, and 

 is angular towards the tip, the latter is tawny : breast dull tawny : 

 abdomen obconical, longer than the chest, tawny at the tip : legs 

 tawny ; hind-shanks unarmed : wings colourless ; veins tawny. 

 Length of the body 1 line ; of the wings 2^ lines. 



a. Charles Island, Galapagos. Presented by C. Darwin, Esq. 



22. Delphax unicolor, Mas. 



Flam-fusca^subtus fulva ; pedes fulvi; al(B perbreves^ anticcefuscce, 

 postica limpid^. 



Body yellowish-brown, tawny beneath : front tawny, hardly 

 longer than broad, punctured along each side ; epistoma yellow, tri- 

 angular, as long as the front : mouth tawny : abdcmien obconical, 

 not longer than the chest : legs tawny : wings very short ; fore-wings 



