300 STAG-BEETLES (FAM. LUCANIDAE) 



7. — Eurytrachelus Thomson. 



E. MJOBERGI sp. n. 



E. alcidis VoUenh. et Fj. eiirycephaU Burm. affinis. 



Niger. Capite reetangula to tenue granuloso, laeviter fornicato, 

 in disco duobus foveis parvis instructo, raargine antico ad labrum nee 

 perco duobus foveis parvis instrucio, margine antico ad labrum nee 

 perpendiculariter truneato. Labro bipartito, similiter ut in E. titano. 

 at partibus longioribus, in medio valde semicirculariter excavato, angulis 

 externis labri carina semicirculare conjunctis. Mandibulis capite fere 

 duple longioribus, tenue granulosis, dente basali magno armatis, furcatis 

 et ante furcam dente minuto instruetis ; subtus ab basi ctriato-pilosis. 

 Mento granuloso punctatociue et margine antico piloso. Reliijuae partes 

 ignotae; long., cap. 15 mm.; mand. 22 mm.; lat. cap. 28.5 mm. 



9 ignota. 



Habit. Mons Murud, Sarawak, Borneo septentrionalis. 



This species belongs to the second section as stated by 

 Jakowleff (Hor. Sec. Ent. Boss, xxx, 1896, p. 457), which 

 has the underside of the mandibles provided with a stripe of 

 golden pubescence from the base to the middle or farther to 

 the tip. It is alUed to E. alcides Vollenh. (Tijdschr. Ent. 

 viii, 1865, p. 150, t. 10, f. 2 cf , 3 9) and eurycephalus Burm. 

 (Handb. v, 1847, p. 387). Dr. Mjoberg, after whom I have 

 much pleasure in naming this species, has obtained only the 

 head, but this is sufficient to recognize that it belongs to a 

 Lucanid hitherto unknown. Black, head and mandibles finely 

 granulated ; head rectangular and soraeM'hat vaulted, on each 

 side of the middle of the disc with a little groove. Mandibles 

 nearly twice as long as the head, in two thirds of their length 

 straight the last third curved inwards. Near the base a 

 strongly developed tnangular tooth, the tip forked and im- 

 mediately liefore the Fork armed with another smaller tooth. 

 Mentum granulated and provided with very distinct punctures; 

 its anterior margin with golden pubescence. 



Type in the Sarawak Museum collection. 



E. PEOSTi Boil. 



Ann. Soc. Ent. Belg., xlv, 1901. p. 15, t. 1 , f . 4. Mollenk. Insektenb., 

 xxi, 1904, p. 375. 



1 Cf and 1 9 from Mt. Poi, 4000 feet. 



2 9 from Mt. Murud, 6500 feet, and Mt. Dulit, 3500 feet. 

 The male specimen is of smaller size, 37 mm. in length; 



towards the tip of the mandibles the median tooth has a con- 

 tinuation in form of a little edge. The females have a length 

 of 23-27 mm. 



