602 Prof. West od's description of the 
short, the three terminal ones cylindrical and of nearly 
equal length, each being about equal to the outer lobe of 
the maxille in length. The mentum is a transverse thin 
plate, with the sides rounded and narrowed towards the 
front margin, which is nearly straight. The labium is 
formed of two lobes rounded at the tips, each having a 
slender division or inner lobe uniting in the middle; the 
labial palpi are cylindrical, each arising from a short 
basal scape, and are four-jointed, the two basal joints 
very short, and the two terminal ones longer, sub- 
cylindrical, setose, the terminal joint not longer than the 
preceding, and obtuse at its extremity. The antenne are 
about half the length of the body, composed of fifteen cylin- 
drical joints, the basal joint being the largest, followed by 
four short joints, the remaining being longer, of nearly 
equal length, somewhat oval in form, and finely setose. 
The three thoracic segments are nearly equal in size 
and rather broader than the abdominal ones; the first, or 
prothorax, is rounded in front; the second, or mesothorax, 
is rather shorter, transverse, rounded at the sides, the 
dorsum entire, without any trace of mesothoracic appen- 
dages; the third, or metathorax, is also transverse, 
rounded at the sides, but with a deep incision on its hind 
margin, probably indicating the future development of a 
pair of wings from this segment. The abdomen is formed 
of a series of depressed transverse joints, the terminal ones 
gradually narrowed, and the apical one terminated by the 
long slender articulated filaments above described. The 
legs are of moderate length and uniform in structure, 
rather slender, the anterior femora alone being thickened 
towards the base, and armed with rather strong short 
bristles on its inner edge. The tibie of all the legs are 
straight and slender, without any terminal spur, and the 
tarsi are two-jointed, the basal joint larger than the 
second, which is affixed on the oblique extremity of the 
preceding joint; the ungues are rather long, slender, 
and acute at the tips. 
The colour has probably been modified by the immer- 
sion of the insects in spirits of wine ; they are at present 
dark brown, with the limbs paler, the four posterior 
femora dusky in the middle ; the prothorax has two large 
pale patches occupying the posterior angles, the emargi- 
nate hinder margin of the metathorax is narrowly edged 
with pale colour ; the abdomen is pale-coloured, with two 
narrow transverse dark bands near the base, and the 
