eo 
126 Prof. Westwood’s Observations on the 
10 [12-*) articulate, articulo 2do 8tio multo majori, 
maris filiformes longitudine fere thoracis, foem. capite non 
longiores fere moniliformes, haud apicem versus incras- 
sate; collare triangulare, antice rotundatum; ale nervo 
subcostale brevi (tertiam partem longitudinis alarum 
non attengenti) callositate parva ad costam terminata, 
alteraque+ subapicali discum versus posita; nervo 
stigmaticali nullo (fig. 55); foem. interdum aptera.”’ 
“Antenne 10- {12-) jointed in both sexes, with the 
2nd joint longer than the 3rd, in the male filiform, and 
nearly as long as the thorax; in the female submonili- 
form and not longer than the head, which is oblong- 
quadrate and flattened; thorax elongate-ovate; collar 
large and triangular, rounded in front; wings with a 
very short subcostal nerve terminated by two minute 
callous spots; female sometimes apterous (fig. d).” 
Cephalonomia formiciformis. 
(Plate VI., fig. 1, male; fig. 2, winged female; fig. 3, 
apterous female.) 
Omalus Polypori, Foerster MS. in Mus. Hopeiano. 
Holopédina Polypori, Foerster, op. cit. supr., p. 502, 
etiam in Mus. Hopeiano, ambobus cel. Foesterio 
ipso transmissis. 
“Nigra nitida, pedibus antennisque piceis, his in 
foem. articulis 2do et 8tio pallidis; variat fem. corpore 
piceo; pedibus, presertim tibiis et tarsis pallidioribus. 
Long. corp. 3}—? lin. Exp.alar.1 lin. In Mus. nostro. 
“Hab. In fungis (pileatis) prope Londinum. 
“Fig. 6, the insect much magnified; e shows the 
natural length of the insect.” 
The above description was published by me in 1833, 
the specimens of this minute insect, which constitutes the 
type of the genus, having been originally found by myself 
in a Fungus growing in the neighbourhood of London. 
Amongst these specimens were winged males, and winged 
and wingless females. Herr Foerster, of Aix-la-Chapelle, 
* By a typographical error the number of joints in the antenne 
was given as 10 in both sexes; but in the figure of the insect (d) 
they were correctly represented as 12-jointed. The error was 
corrected in my Introduction, Gen. Synopsis, p. 75. 
+ This second callous spot is placed just below the apex of the 
subcostal vein, 
