37 



Maris pygidio sat convexo, opaco (apice anguste nitido), minus 



perspicue punctulato, setis ut elytra vestitis ; tibiis posticis 



manifeste flexuosis. 

 Feminge pygidio planato, ut maris sculpturato et vestito, parte 



postica nitida in medio retrorsum angulatim dilatata ; 



tibiis posticis haud flexuosis. Long., 4| 1.; lat., 3 1. 



Closely allied to 0. armiger, Westw., but a little smaller, with 

 the clypeal teeth shorter, and having the outline of the prothorax 

 notably different. The lateral margin of that segment runs from 

 the front angle obliquely hindward and outward, then making a 

 well-defined angle runs nearly straight (but slightly inward) 

 nearly to the base where it makes another angle, from which it 

 runs very obliquely to the base. The outline between the front 

 margin and the anterior of the lateral angles is almost strongly 

 (and that between the lateral angles slightly) concave. Of the 

 other described species of Cephalodesmius, Castelnaui, Har., and 

 Macleayi, Har., are described as having nitid levigate arese or 

 tubercles on the disc of the prothorax ; quadridens, Macl., has 

 the front part of the head impunctulate ; cornutus, Macl., has 

 the clypeal structure altogether peculiar, and laticollis, Pasc. 

 (which is very slightly described) is stated to be much larger than 

 the insect before me (long., 7 1.) with the prothorax wider than 

 the elytra (in the present insect it is by measurement slightly 

 narrower than the elytra), and it is implied that the prothorax 

 is of the same shape as in armiger. 



N.S. Wales ; Richmond R. (sent by Mr. Lea). 



C. armiger, Westw. The male of this species has the hind 

 tibiee scarcely flexuous and the pygidium very similar to that of 

 C. minor, while the pygidium of the female resembles that of 

 C. minor in having a nitid apical space dilated hindward in the 

 middle, — but the shape of the dilatation is very different in the 

 two species, being in minor a small triangular space in the middle 

 of the narrow nitid edging of the segment, while in armiger the 

 subtriangular nitid space covers the whole apical portion of the 

 segment, — -the lines that meet in an angle on the middle line of 

 the segment having their other extremities at the lateral ends of 

 the nitid space, — their angle thus being widely obtuse, while in 

 minor it is acute. 



LABROMA. 



L. horr'ens, Shp. Mr. Lea has recently sent to me for identi- 

 fication a specimen of this insect. Dr. Sharp (Rev. and Mag. de 

 Zool. 1873, p. 262) in characterising the genus stated that the 

 type had no front tarsi, but that very probably they had been 

 broken off. The example before me has front tarsi very similar 

 o those of Cephalodesmius, to which genus it is very close. 



