ORTHOPORUS., 
b’. Distal extremity of the posterior lamina of the coleopod not running out 
into a long sharp spiniform process; the external process, when present, 
short, usually stout, and commonly much narrower at the base than the 
part of the lamina which bears it. 
d. A. rounded lamella projecting obliquely and externally from the distal end of 
the posterior lamina of the coleopod near its external margin . . 
. No rounded lamella projecting from the anterior surface of the distal end of 
the posterior lamina of the coleopod. 
e. Distal end of the posterior lamina of the coleopod laterally compressed 
and bearing externally a stout blunt process which projects at right 
angles to it. oe . . woe ee ee 
. Distal end of the posterior lamina of the coleopod antero-posteriorly 
compressed, and usually expanded and lamelliform. 
f, A sharp and slender spine projecting obliquely outwards and down- 
wards from near the supero-external angle of the elliptically expanded 
termination of the posterior lamina of the coleopod . . . 
jf‘. A process, when present in the above-mentioned position, stout or 
slender, but projecting upwards or upwards and outwards. 
g. A short stout process projecting at right angles to the long axis of 
the lamina from the supero-lateral angle of its rounded lamellate 
distalend. 2... . ww ee ee ee 
g'. When a process projects from the above-mentioned position it is 
directed obliquely upwards. 
h. The distal end of the lamina but little expanded, but bearing 
externally a stout and strong upwardly curled hook. the external 
edge of which forms a continuous curve with the inferior edge 
of the part from which it arises , re 
. Distal end of the lamina more expanded, not bearing a stout 
curved hook. 
i. Distal end of the lamina bearing a very short and stout process 
on the infero-external angle of its expandedend . . . 
7‘. Distal end of the lamina bearing externally a slender sub- 
cylindrical subspiniform process. 
k, This process arising obliquely upwards and outwards from 
the supero-external angle of the rounded lamellate ex- 
pansion, which has an evenly convex inner, lower, and 
outer edge er er 
k*, This process arising from near the middle of the outer edge 
of the lamellate expansion, the infero-internal edge of 
which is obliquely cut away 
1. Orthoporus typotopyge. 
omalopyge. 
amulensis. 
teapensis. 
cordovanus. 
palmensis. 
typotopyge. 
montezume. 
rodriguezt. 
Spirostreptus (Scaphiostreptus) typotypyge, Brodlemann, Ann. Soe. Ent. France, Ixxiv. p. 359, t. 9. 
fig. 17 (1905) ?. 
Colour: clive-black, the segments bordered with ferruginous; legs and antenne ferruginons. 
