12(5 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



on lower half bare, cheeks nearly one-half as broad as the eye height, 

 eyes densely hairy. Apical cell entering costa far before the extreme 

 wing tip, open, fourth longitudinal vein appendiculate beyond bend. 

 Abdomen ovate, bearing discal and marginal macrochaetae, the hypo- 

 pygium considerably exerted and doubled forward beneath the venter. 

 Type, the following species. 



Spilochaetosoma californica new species. 



Male: Robust, black, first and second antenna! joints, palpi, tip of 

 proboscis, sides of first three abdominal segments and hypopygium yel- 

 low. Frontal vitta opaque velvety dark brown, parafrontals and fas- 

 cialia silvery pollinose with a faint golden tinge in certain reflections. 

 Sides of face approximately one-half as wide as the median depression, 

 cheeks thickly beset with bristly black hairs. Proboscis short, shining 

 black and chitinized on the intermediate third, fleshy at the tip. Front 

 at vertex nearly one-half the eye width. Thorax gray pollinose, marked 

 with four prominent black vittae. Postsutural dorso-central bristles 

 three, sternopleurals four. Apical two-thirds of scutellum yellowish, 

 bearing three pairs of long marginal macrochaetae and a strong discal 

 pair. Legs black, front pulvilli about one and one-half times as long as 

 the last tarsal joint. Middle tibiae bearing a row of four long stout bristles 

 on the outer front side, the hind tibiae pectinate with a row of bristles of 

 unequal length. 



Hairs of abdomen depressed. Second abdominal segment bearing a 

 discal and a marginal pair of macrochaetae, the third a discal pair and a 

 marginal row, and the fourth segment a discal and marginal row. Hypo- 

 pygium bearing many stout black bristles upon the first and second seg- 

 ments. Wings faintly infuscate along the costa, veins brownish, the 

 third longitudinal vein bearing six or seven bristles at its base, posterior 

 end of hind cross-vein nearer the margin of the wing than to the small 

 cross-vein. Calypteres whitish. 



Described from a male specimen taken in the mountains near 

 Claremont, Calif., by Mr. Carl F. Baker. 



Holotype:V. S. N. M. Cat, No. 20,930. 



Under the head of notes and exhibition of specimens the fol- 

 lowing were given: 



THE ELATERID GENUS OISTUS OF CANDEZE. 



BY J. A. HYSLOP, 



Bureau of Entomolixjii. 



The genus Oistus was described by Candeze to include two 

 Mexican elaterids of the tribe Chalcolepidiini. The genus is 

 very unsatisfactorily distinguished from the Oriental genus 

 Campsosternus, the chief differential character used by the great 



