LIST OF HOMOPTEROUS INSECTS. 561 



length of the head : fore-chest roughly punctured, indistinctly 

 ridged, slightly flattened and almost triangular in iront, keeled be- 

 hind the shoulders, which are slightly prominent and very obtusely 

 angular ; keel slightly concave and with a semicircular furrow on 

 each side, where there are a few black spots, concave beneath and 

 attenuated towards the tip, which is acute and extends beyond the 

 tip of the abdomen : breast and abdomen partly pitchy : oviduct 

 luteous, pitchy towards the base : legs tawny : wings colourless ; 

 veins yellow : fore-wings slightly marked with black towards the 

 base, which is punctured ; two discoidal areolets. Length of the 

 body 3 lines ; of the wings 7 lines. 



a. Mexico. Presented by E. P. Coffin, Esq. 



16. Thelia semifascia, Mas et Fern. 



Mas. Flava, fusco-bifasciata ; pectus et abdomen nigra ; femora 

 supra nigra ; alee limpidcB ; ales anticce basi fulvce, apice 

 fuscce. Fern. Carina luteo et albido fasciata ; pectus ^ abdo- 

 men et femora fulva. 



Very near allied to T. tumida. Male. Yellow: head and fore- 

 chest shining : head punctured, transverse, almost triangular, nar- 

 rower than the fore-chest, slightly undulating along the sides, 

 somewhat impressed on each side ; hind border of the face almost 

 semicircular, occupying much less than half the length of the head : 

 fore-chest convex, slightly ridged in front, keeled behind the 

 shoulders, which are rounded and hardly prominent ; keel slightly 

 undulating on each side, with two broad, irregular brown bands, 

 not attenuated, but embracing the sides of the abdomen and ex- 

 tending far beyond its tip : breast and abdomen black, tip of the 

 latter ferruginous : thighs black above : wings colourless ; veins 

 tawny : fore-wings tawny at the base, punctured at the base and 

 along the veins to the disk, brown at the tips and on the hind 

 border at the base ; two discoidal areolets. 



Fern. Keel with alternate luteous and whitish bands ; breast, 

 abdomen and thighs tawny. 



Length of the body 2^^ lines ; of the wings 6 lines. 



a — d. St. John's Bluff, E. Florida. Presented by E. Doubleday, 

 Esq. 



•2 D 



