808 MR, W. L. DISTANT ON THE RHYNCHOTA [ Noy. 20, 
fragmentary knowledge of the Order in those days is considered, 
with the obscurity that then enshrouded the Fabrician species, 
which Westwood seems to have almost ignored. Much of this 
synonymy has been elucidated, especially by the late Dr. C. Stl, 
who in 1862 visited this country, examined the_ collection and 
made notes thereon, which were published in the Ofv. Vet.-Akad. 
Forh. 1862, p. 501. These were again given, sometimes in a 
revised form, in his subsequent ‘ Enumeratio Hemipterorum.’ 
Like all Stal’s work, this casual examination produced reliable 
correction, but much was still left in an obscure condition, and 
our catalogues contain many doubtful references to a number 
of Westwood’s species described from this collection. 
I have to thank Prof. Poulton, who has succeeded Prof. West- 
wood at Oxford, for placing the whole collection in my hands for 
comparison and revision. I have carefully compared all the types 
with those contained in the British Museum and my own collection, 
with the result of finding that though many of Westwood’s species 
must rank as synonyms, he has on the otber hand priority in 
many cases over the descriptions of more recent workers, who 
have failed to recognize his species by their short descriptions 
and unrevised generic position. It 1s probable that Continental 
desecribers may also be compelled to withdraw some of their 
own descriptions for a similar reason, and the figures with which 
the Society has allowed me to illustrate this communication may 
facilitate that result. 
Some few species are in such indifferent condition as to render 
generic identification impossible—at least with certitude; but in 
most cases these are figured, and thus eventually, when better 
specimens reach the hands of w orkers, they can be recognized and 
then generically disposed. 
Subfam. DiscocePHALIN &. 
DINOCORIS UNICOLOR. 
Dinidor unicolor Westw. in Hope Cat. i. p. 25 (1837). 
Antileuchus piceus Dall. (part.) List Hem. i. p. 165. n. 6 (1851). 
Dinocoris unicolor Stal, En. Hem. ii. p. 9. n. 16 (1872). 
Dinocoris piceus Dist. (part.) Biol. Centr.-Am., Rhynch. 1. p. 46. 
n. 2 (1880). 
In the Biol. Centr.-Amer. I had followed Dallas in placing the 
D. unicolor Westw. as a synonym of D. piceus Pal. Beauv. On 
examination I find the two species are quite distinct, that of 
Westwood having a greater width of abdomen and the upper 
surface distinctly rugose. 
DINOCORIS TESSELLATUS. 
Dinidor tesselatus Westw. in Hope Cat. 1. p. 24 (1837). 
Dinocoris tessellatus Stal, En. Hem. ii. p. 9. n. 14 (1872). 
A species closely allied to the D. amplus Walk., but having the 
second and third joints of the antenne wholly black. 
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