426 rs Mr. R. E. Turner on 
attingente fuscis; cellula brachiali secunda apice leviter infus- 
cata; ou maximo, vertice fortiter bituberculato. 
Long. 14 mm.; terebre long. 12 mm. 
@. Mandibles broad, with two apical teeth, the outer one 
long, the inner one very short, above the inner tooth the 
edge of the mandible is broadly rounded. Second joint of 
flagellum about two and a half times as long as the first, 
third a little more than half as long again as the second. 
Clypeus rather sparsely punctured, front minutely and 
very closely punctured. Head massive, subquadrate, 
strongly produced behind the eyes, cheeks distinctly longer 
than the scape, temples distinctly broader than the eyes; 
posterior ocelli as far from each other as from the eyes and 
nearly three times as far from the hind margin of the head. 
Vertex produced posteriorly on each side into a large, 
upright, blunt tubercle. Behind each of the posterior 
ocelli, and separated from them by the same distance that 
separates them from the anterior ocellus, is a minute 
tubercle, which at first sight resembles a minute ocellus. 
Thorax without spines or tubercles; neck short; meso- 
notum and scutellum strongly transversely striated ; pre- 
scutum concave in the middie anteriorly ; mesopfeurz less 
strongly striated ; postscutelinm coarsely longitudinally 
striated, median segment coarsely and irregularly trans- 
versely striated, bluntly produced above the insertion of 
the abdomen. ‘Tarsal ungues with a row of four teeth, 
excluding the apical tooth. Abdomen stout, the first 
segment very strongly broadened from the base, third and 
following tergites clothed with very delicate fulvous pubes- 
cence. Second abscissa of the radius half as long again as 
the first; second transverse cubital nervure incomplete ; 
nervulus distinctly postfurcal ; first recurrent nervure 
received by the first cubital cell at a distance equal to half 
the length of the first abscissa of the radius before the first 
transverse cubital nervure. Terebra and valvule black. 
Hab. Vien Poukha, Upper Mekong (2. Vitalis de Salvaza), 
May 10) 191s: a2. 
Easily distinguished from other species of the genus by 
the extraordinary form of the head. Aulacus bituberculatus, 
Cam., has similar tubercles on the head, and is probably 
related to this species, though Cameron says that it belongs 
to Aulacinus, having three cubital cells. 
