120 GEO. H. HORN, M. D. 



Phyllobvot'ica, but the slender, slightly diverging processes of the 

 third and fourth ventrals are very unusual. The plication of the 

 side margin of the male elytron is also a rare character, but some 

 of the species of Malacorhinus are similarly provided. 



Two specimens from the coast range region of California, south 

 of San Francisco. 



MALACORHINUS Jacoby. 



Head oval, not deeply inserted, front with a transverse impressed 

 line, frontal tubercles flat. Eyesslightly oval, moderately prominent ; 

 labrum transver.se, entire; maxillary palpi moderately stout, the 

 terminal joint conical, longer than the preceding. Antennae slender, 

 longer than half the body, first joint rather stout, second half as 

 long, third as long as first, fourth a little longer than third, joints 

 five to ten equal to third, eleventh a little longer. Thorax quadrate, 

 narrower in front ; scutellum broadly triangular. Elytra oval, 

 broader in the male; epipleuroe moderately broad, reaching nearly 

 the apex ; prosternum narrowly prolonged between the coxa), the 

 cavities open behind. Legs slender, tibiae rounded on the outer 

 edge, the anterior pair without terminal spurs; tarsi moderately 

 long, the first joint of the posterior a little longer than the next two 

 joints together ; claws appendiculate. 



To this genus Androlyperus maculatus is referred. The description 

 by Jacoby is far too short, however, to be absolutely certain, but the 

 facies and the male sexual characters leave very little doubt that 

 our species is congeneric with some of those placed by Jacoby as 

 typical of the genus. The joints, about which there may be doubt, 

 are as follows : Jacoby states that the front Coxae are contiguous ; 

 our species has a laminiform prosternum separating them ; it is also 

 vaguely stated that the tibiae are mucronate, but it is not stated 

 whether all are so ; the thorax is said to be constricted at base, but 

 our species and all those figured show no constriction, but merely 

 that the thorax is narrower at base than at apical third. 



.The pcsition of the genus in its relation to those already described 

 is somewhat problematical. It seems to be related to Malacosoma, 

 but the tarsi more nearly approach those of the Luperite series. In 

 fact, the female of the only known species has been placed in Mala- 

 cosoma by Allard. At present it will })robably be best to associate 

 it with Androlyperus to form a group based on the structure of the 

 tarsi and the deformed elytra of the male. 



One species occurs in our fauna. 



