Zoological Society. 257 



In both sexes the carination of the elytra follows that of D. ma- 

 culicollis, but is less pronounced. . 



Compared with D. maculicoUis both sexes of this species are ot 

 smaller size, and the discrepancy in breadth is rather more obvious 

 than in length ; the antennae of the males are very similar, but the 

 apical joint is more clavate in par ; their colour is decidedly different, 

 in maculicoUis being black, in par testaceous, with the apices of the 

 ramuh slightly darker ; the prothorax is more rounded at the sides in 

 par than in the older species ; but the plainness and purity of colour 

 in par are sufficient at once to distinguish it. 



Male and female in the cabinet of Mr. Scott, to whom I am in- 

 debted for the opportunity of describing it. 



3. DiSTICHOCERA KiRBYI. 



Mas. Caput nigrum, longitudinaliter sulcatum, antennes dimidio 

 corporis longiores, W-articulatce, articulis 3-10 biramosis, Wo 

 sesquialtero : prothorax niger vittis 2 latisfulvis, dorso iruBqua- 

 lis lateribus medio \-dentatus : scutellum nigrum : elytra fulva, 

 5-carinata, apice dehiscentia, singulo truncato, truncaturd bi- 

 sinuatd : pedes nigri. 

 Corp. long. 1-15 unc; elytrorum lat. max. "3 unc. 

 Fem. Caput nigrum, longitudinaliter sulcatum, antenn<e dimidio 

 corporis vix longiores, \l-articulatce articulis 4-8 apice emar- 

 ffinatis : prothorax niger vittis 2 latis fulvis, lateribus medio 

 l-dentatus: scutellum nigrum lateribus fidmm : elytra fulva 

 5-carinata apice dehiscentia, singulo truncato, truncaturd bi- 

 sinuatd, pedes nigri. 

 Corp. long. 1-25 nnc. ; elytrorum lat. max. -375 unc. 

 MaZe.— Head black, with the exception of a scarcely perceptible 

 fulvescent tinge on the short velvety down of the epicranium ; a deep 

 epicranial longitudinal sulcus extends forwards between the antennae: 

 eyes arcuate, reniform, pitchy black, large, approaching on the epi- 

 cranium, dilated and gibbose on the cheeks : antennae more than 

 half the length of the body, 1 1 -jointed ; the first joint rather short 

 stout, somewhat in the common shape of a reversed cone ; the second 

 joint very short ; the following, to the tenth inclusive, short, some- 

 what cup-shaped towards the base, and emitting at the apex two long 

 branches, which are slightly incrassated externally ; the eleventh 

 joint is much longer than either, slender towards the base, somewhat 

 club-shaped and very decidedly sesquialterous : prothorax uneven on 

 the back, somewhat restricted just behind the anterior margin ; lateral 

 margins produced in the middle into a decided strong but obtuse tooth; 

 the posterior half of each lateral margin concave, yet the anterior and 

 posterior margins are straight and nearly equal in breadth ; the colour 

 of the prothorax is black, with the exception of two broad fulvous 

 irregular vittse extending from the anterior to the posterior margin : 

 prostemum black, shining, projecting between the anterior coxae, and 

 the projection deeply emarginate : scutellum rather long, blunt at the 

 apex, perfectly black : elytra fulvous, slightly divaricating, conspi- 

 Ann. if Mag. N. Hist. Ser. 2. Vol. xi. 17 



