88 HETEROMERA. 
two specimens of which from Texas are before me, but may be distinguished from it by 
its smaller and more widely separated eyes, finer and more closely punctured elytra, 
and rather more elongate shape. Though variable in colour S. tropicalis invariably 
has the elytra darker than the head and thorax. S. rugosa, Lec., is unicolorous and 
has a much more rugose and less convex thorax. 
2. Symphora impressicollis. 
Closely resembling S. tropicalis and differing as follows:—The antenne entirely testaceous; the prothorax 
more convex, more rounded at the sides, scarcely narrower at the apex than at the base, the surface 
rather more coarsely punctured, the impressions deep; the elytra with the sutural region broadly and 
indeterminately (still more broadly so towards the base) fusco-testaceous ; the under surface a little more 
coarsely punctured. 
Length 22 millim. 
Hab. Mexico, Acapulco (Hége). 
Though only a single example has been received of this insect it seems impossible to 
treat it as a variety of S. tropicalis. 
8. Symphora apicalis. (Tab. IV. fig. 18.) 
Moderately elongate, not very convex, shining, sparsely pubescent, black, the head and oral organs, the prothorax, 
the apex of the elytra, and the legs flavo-testaceous. Head very closely and moderately finely punctured, 
the eyes small and very widely separated; antenne moderately long, joints 1-4 testaceous, the rest 
piceous ; prothorax strongly transverse, not very convex, narrowing from the base, the hind angles sub- 
rectangular, the disc with a large and deep oblique groove on each side, the surface densely and coarsely 
punctured ; elytra subparallel to about the middle, narrowing thence to the apex, very closely and rather 
coarsely punctured ; beneath coarsely and densely punctured. the ventral surface much more finely so, the 
last two segments fusco-testaceous, the rest (except the head and prothorax) black. 
Length 22 millim. 
Hab. Panama, Volcan de Chiriqui 4000 feet (Champion). 
One specimen. ‘This species closely resembles S. tropicalis, and, at first sight, would 
appear to be only a colour-variety of that insect; it differs, however, in the more 
coarsely punctured under surface, the metasternum, especially, having very much 
coarser impressions. The thorax is narrowed from the base, and has the oblique 
impression on each side of the disc larger and deeper, and (like the elytra) is also a 
little more coarsely punctured. 
4. Symphora ruficeps. 
Moderately elongate, convex, sparsely pubescent, slightly shining, piceous-brown or brown, the head (except the 
eyes) and the shoulders, and sometimes the sides of the prothorax and of the elytra (indeterminately), reddish- 
' testaceous or testaceous. Head very closely and rather coarsely punctured, the eyes small and very widely 
separated, the last joint of the maxillary palpi piceous; antenne moderately long, thethree or four basal joints, 
and sometimes the apical one or two, testaceous, the rest piceous ; prothorax convex, transverse, narrowing 
from the base, the disc with a rather shallow oblique groove on each side towards the base, the surface densely 
and rather coarsely punctured ; elytra subparallel to about the middle, rather obtuse behind, very closely and 
