18fi7.] 97 
Abdomen — black ; in the c? , on the underside the first 5 segments have 
each tliree wide, but very shallow, contiguous depressions ; on the 
6th, throughout its length, is one larger and deeper depression, of 
which the edges are brown ; the posterior margin has a deep 
rounded excision in the middle. Connexivum yellowish outwardly 
but brown on the edge, the points not prolonged nor acute. 
Genital segments in the ^, above, black, broad, sides sub-parallel, 
extending far beyond the points of the connexiva ; 2nd segment 
very short; beneath yellow-brown; the 1st constricted at the 
base, spread out posteriorly round the base of the 3nd, which is 
large and globose ; 3rd as above : in the ? , above, the 1st tra- 
peziform, tapering posteriorly, and not projecting beyond the 
points of the connexiva, is brown in the middle and yellow-brown 
at the sides ; 2nd black, short ; beneath both yellow-brown, the 1st 
convex, regular, sloping gradually towards the upper side ; 2nd 
as above. Length 5| lines. 
Eesembles IT. thoracica, but distinguished by its greater size and 
robustness, especially across the region of the middle coxae ; by the 
broader ferruginous colour of the pronotum, the form of the genital 
segments, and other minor characters. 
First brought from Rannoch in 1865 by Mr. McLachlan, and 
taken freely in the same locality in June, 1866, by Mr. Eye and the 
Eev. T. A. Marshall. 
Species 5*. — Htdbometba odontogaster. 
Geebis lacusteis, var. e, 3, Latr. Gen. 133 (1807). 
Htdeometea odontogastee, Zett., F, Ins. Lap. i., 506, 3 (1828) ; 
Ins. Lap. 282, 3 (1839) ; H. Sehf., "Wanz. ix., 67 and 73, t. 
299, fig. Q to S., t. 301, fig. 931 (1850) ; Mor, Ehyn. Liv. i., 
738, 4 (1860) ; Fieb., Europ. Hem. 109, 11 (1861). 
Geeeis odontogastee, Schtm., Beitr. 36, 4, t. 3, fig. 8 — 10 (1832) ; 
m Schf., Norn. Eut. 62 (1835). 
Black, dull, with golden scale-hairs ; in the ^ t\\e 6th abdominal 
segment beneath with two short, obtuse processes ; in the $ the 1st 
genital segment with a deep transverse basal furrow. 
Head — at the sides, with a silvery gloss, cheek plates yellow outwardly. 
Antennce and rostrum black. 
Thorax — Pronotum, anterior region impunctate, regularly depressed 
inwards from the moderately incrassated sides, middle and sides 
with a yellow line, anterior angles with a small node ; posterior 
