212 Dr. W. E. Collinge on the 
Boulder, Colorado, March 24, 1920 (Elery R. Becker). 
Visits flowers of Townsendia exscapa (Rich.), which is the 
first spring flower in the locality. This might be taken for 
A. nasoni, var. fulvodorsata, Viereck, but the clypeus is quite 
different, and the wings are differently coloured. On account 
of the red hair on scutellum, it resembles A. scutellaris, Rob., 
but that has first r.n. joining the oblique second s.m, far 
beyond middle, much weaker abdominal bands, &c. 
Bombomelecta semifulva, sp. n. 
6 .—Length about 14°5 mm., anterior wing 10°5 mm. 
Black, somewhat elongate, the thorax above and first 
abdominal segment densely clothed with fulvous hair; head 
very broad, with prominent eyes, and projecting clypeus ; 
hair of head a peculiar sooty grey, partly reddish on clypeus, 
thick and black on outer side of scape, long and broadly 
tipped with black on upper part of cheeks behind; third 
antennal joint a little longer than fourth; sides and venter 
of thorax with mouse-coloured hair, very broadly tipped 
with black on mesopleura ; metathorax with similar, largely 
. black, hair; scutellum with the usual spines, hidden by 
hair; tegule black. Wings stained with brown, but not 
dark. Legs with mouse-coloured hair, black on inner side 
of tarsi. Abdomen beyond first segment with appressed 
greyish-brown hair, mixed with longer black hair, which 
becomes more abundant on the apical half; no trace of 
bands or spots. 
Boulder, Colorado, May 17, 1920 (Elery R. Becker). 
A very distinct species, perhaps nearest to B. pacifica 
(Cress.), but readily known by the hair on abdomen. 
XXVI.—A Preliminary Study of the Structure and Function 
of the Cutaneous Glands in the Terrestrial Isopoda. By 
Water E. Coiiinez, D.Sc., F.L.8., The University, 
St. Andrews. 
[Plates II, & II.7 
INTRODUCTION. 
It has frequently been pointed out by investigators upon the 
minute anatomy of the Terrestrial [sopoda, how numerous 
are the difficulties that are presented in connection with the 
preservation and preparation of the different organs for 
histulogical investigation. Huet (3) has very truly stated that 
