Rev. F. W. Horx on some Nondescript Insects from. Assam. 591 
Spec. 8. LUCANUS oMissus. 
Long. unc. I, lin. 9. Lat. lin. 6. 
Castaneus ; mandibulis vald? exsertis, apicibus acutis, dentibus 2 nigris sub- 
basalibus aliisque 4 subapicalibus. 
Caput antennis nigris, dentibus binis in vertice valdé elevatis, foveâque inter 
dentes vix fortiter impressá. Mandibule valde exserte, apicibus acutis, 
dentibus binis nigris juxta basin quatuorque prope apicem positis. Thorax 
punctatus, margine omni elevato. Elytra castanea, marginibus tenuissimis 
suturáque nigris. Corpus infrà rubro-piceum, femoribus tibiisque conco- 
loribus, tarsis nigris. Femina adhuc mihi incognita. 
I have given the specific name of omissus to the above insect, as I at first 
imagined it to be the same as a Javanese species named in the French cabinets 
castaneus. On a closer examination it appears to be distinct, and is now de- 
scribed. I have received it from Dr. Cantor: it appears to be of rare occur- 
rence. 
Spec. 9. LUCANUS SERRICOLLIS. 
Long. unc. 1, lin. 3. Lat. lin. 6. 
Ater politus; mandibulis parüm exsertis sinuatis et punctatis. 
Antenne nigre, articulis 6 ultimis cinerascentibus. 
Caput antice fortiter punctulatum, mandibulis parùm exsertis sinuatis et punc- 
tatis. Thorax convexus, anticè et postice lineà elevatà insignitus, lateri- 
bus serratis. Elytra glabra, nitida. Corpus infra nigrum, pedibus con- 
coloribus. Femora parüm incrassata, tibiis valde lineato-punctatis et 
unidentatis. Tarsi infra luteo-comati. 
The above insect appears to be the male of a hitherto unknown species of 
Stag-beetle; and it seems probable that when the female is discovered, it may 
form the type of a new genus; it belongs to the section which has five leaflets 
forming the club of the antennze. 
