180 NEW SPECIES OF AUSTRALIAN COLEOPTERA, I., 



This apparently rare species has most affinity with M. rvjicornisy 

 Champ., in the colour of antennae and legs, size and general out- 

 line. It is, however, a much flatter insect, its colour is darker 

 and its elytral striation deeper and more regular. 



Otrintus jacksoni, n.sp. 



Elongate, slightly convex, opaque, black throughout except 

 that antenna?, tarsi and tibia? beneath are clothed with casta- 

 neous hairs. 



Head as long as broad (3 mm.), widest at the eyes- clypeus with 

 front margin straight and reflexed. Frontal impression deep 

 and irregularly coarsely punctate-foveate {$ wrinkled, 9 with- 

 out wrinkles). E^^es widely separate. Antennae long and stout, 

 extending slightly beyond base of prothorax, 3rd joint about as 

 long as -ith and 5th combined. Pi'othorax (4-5x4 mm.), in 9 

 widest at front angles, in ^ widest a little behind the front; flat, 

 with fine shallow punctures, emarginate anteriorly, margin nar- 

 row at base, sides gradually and sinuously narrowing to base. 

 Anterior angles marked, but not so prominent as in 0. Behri. 

 Base angles rectangular, wider at apex than at base. Median 

 line pronounced throughout. Elytra {$ 10*5 x 5, 9 11 x 5*6 ram.) 

 less convex than 0. Behri, with a series of eleven deep strice on 

 each elytron, without perceptible punctures. Two strife next 

 suture extending to apex, the others alternately joined before 

 reaching apex. Interstices minutely rugose. Epipleurse lightly 

 punctate. Legs black, joints slightly castaneous, hind tarsi long, 

 l.st and 4th joints longer than in 0. Behri. Sternum and abdomen 

 finely but not densely punctate. Dimensions 16-17 x 5-5*6 mm. 

 Hab.—Vpper Bellinger Biver, N.S.W. (S. W. Jackson, Esq.). 

 So far as I am aware, this is the second member of this genus 

 that has been described. It diff'ers widely from 0. Behri, Germ., 

 in, inter alia, its opaque colour, slenderer and flatter form, its 

 infoveate frontal sculpture, the long hind tarsi, and its antennae. 

 (In 0. Behri the 3rd joint is little longer than the 4tli). I have 

 named it from its discoverer, who generously gave me a pair. 



