78 
wards the suture without reaching it, terminating in the apical area ; 
the second is indistinct, origmates near the humeral angle, and run- 
ning parallel with the first, ceases in the apical area; the third is still 
less distinct, and its limits are obscure ; at both extremities a junction 
between the first and second carinze may be made out, but is not very 
manifest : the wings are fuliginous, slightly longer than the elytra, 
but scarcely so long as the abdomen; the entire under-surface is 
pitchy red ‘clothed with a silvery grey pubescence, but there is an 
ovoid denuded space on each side of each abdominal segment. Legs 
pitchy red ; tarsi pitchy black ; metatibize with two apical spines. 
Obs.—I believe that no author has hinted at the union of these 
very dissimilar insects under one specific name, but I think such a pro- 
ceeding will be borne out by the evidence. In the first place I would 
observe that both forms are equally abundant ; that they occur in the 
same situations and at the same season; that collectors have several 
times reported them as only sexually different ; and finally, that all 
the individuals of maculicollis are males, and all the individuals of fu/- 
vipennis females. Then, as regards structure, the cibarian organs of 
the two forms closely approximate ; so also does the direction and 
general figure of the head; the antennze indeed are remarkably dif- 
ferent, but this discrepancy obtains equally in several genera of lon- 
gicorns and in many other groups of Coleoptera, the males invariably 
possessing in such instances the longer, more compound and more 
ornate antennz. The discrepancy in the prothorax, which at first is 
very striking, will be found more in appearance than in fact, and more 
in colour than in figure; and even in colour an analogy exists that 
would be likely to escape the superficial observer ; the two fulvous 
vittee so conspicuous in fulvipennis appear divided, paler, and semi- 
obsolete in maculicollis, and the difference in the figure of this part 
is in simple accordance with the more robust habit in the supposed 
female: the discrepancy in the elytra again is considerable as regards 
width, and particularly striking as regards colour; but their strue- 
ture is normally the same; the number, direction and comparative 
length of the carine being identical: the legs are precisely alike in 
the two forms in structure, proportions, size and colouring. So that 
the reasons for uniting the forms under one specific name are stronger 
than any that can be urged for keeping them distinct ; and their not 
having been united by Kirby, MacLeay, Guérin, or Boisduval, merely 
implies that the idea did not occur to those distinguished entomolo- 
gists: there is no evidence that they maturely weighed and then re- 
jected the conclusion. 
2. DisticHocerA PAR. Sexuum amborum color par: testaceo- 
fusca, maris capite prothoracisque disco saturatioribus ; om- 
nin) pilis cinereis obsita. 
Maris long. corp. *525 unc.; elytrorum lat. max. *2 une. 
Femine long. corp. *7 unc.; elytrorum lat. max. *225 une. 
Male.—Antenne, anterior margin of prothorax, elytra, legs, and 
entire under-surface testaceous brown, the head and disk of the pro- 
thorax being darker ; a longitudinal, narrow, silvery spot, due to the 
