43 
of the process being slightly curved, in persimilis a small flattish 
lamina appears to jut out (from the top of the process) directed 
towards the head and also sloping downwards, so that from a 
certain point of view (7.e. from the side) the top of the process 
seems to be obliquely truncate with its point furthest from the 
head subtuberculiform. The process (as in rectangulus) is densely 
hirsute but in this species the front part of the flattened top is 
glabrous. This species is distinguished from all the recognisably 
described Semanopteri (except rectangulus) by the peculiar out- 
line of its prothorax which (viewed from above) looks as if a 
small piece had been cut-out on either side close to the base. 
N. Queensland ; sent by Mr. French. 
S. dentatus, sp. nov. Late ovalis; minus convexus; nitidus ; 
piceo-niger, subtus vix rufescens, rufopilosus ; capite crasse 
squamose nec profunde ruguloso, tuberculo magno armato, 
pone tuberculum fossa levi impresso; prothorace quam 
longiori plus quam dimidio latiori, subgrosse minus crebre 
nec profunde (in depressione et versus angulos anticos crasse 
squamose) punctulato, antice angustato, margine antico in 
medio leviter elevato, lateribus sat rotundatis, angulis 
anticis sat prominulis posticis (superne visis) rectis (haud 
acute); elytris minus equaliter sat crasse leviter punctulato- 
striatis, vix manifeste costatis, puncturis striarum et inter- 
stitiorum nonnihil confusis; tiblis anticis extus fortiter 
tridentatis ; abdomine sparsim leviter squamose punctulato ; 
processu. prosternali minus angusto, retrorsum fortiter 
bidentato. 
Mas latet. 
Feminz prothorace antice fossa rotundata, postice sulco longi- 
tudinali obsoleto, impresso. Long., 11 1; lat., 6 1. (vix). 
The remarkable form of the prosternal process at once separates 
this species from its described congeners. The process may be 
described as rising upwards from the level of the prosternum 
behind the cox, but instead of rising erectly it inclines forward, 
and its hinder face bears two large transverse blunt teeth or 
tubercles (one below the other) and is nearly glabrous. The 
nitid depression on the head behind the tubercle is also very dis- 
tinctive. As the apical ventral segment is not emarginate I 
presume the example before me is a female. The prosternum 2m 
front of the coxee is somewhat wide, with a strong median keel. 
N. Queensland. 
S. carinatus, sp. nov. S. persimili valde affinis ; differt dentibus 
tibiarum anticarum minoribus, tarsorum posticorum articulo 
basali ad apicem minus lato, processu prosternali ad sum- 
mum sat longe horizontali anguste cariniformi, nec tubercu- 
lato. Long., 7 1.; lat., 41. 
