64 ENTOMOLOGICAL NEWS. [Feb., 'l2 



Prothorax twice as broad as long; sides extended, coxae showing 

 through very slightly darker ; otherwise without distinct markings : 

 sides with one long hair. Metathorax narrow in front ; sides slightly 

 arcuate, diverging; color brown, coxae showing through as darker 

 blotches; dorsum with short scattered hairs; sides with one long hair: 

 legs short, femora thick, lighter than general body color, and with num- 

 erous bristles. 



Abdomen elongate; basal segment as broad as apex of thorax; broad- 

 est at segments 3 to 5 ; first segment with one hair at marginal angle ; 

 others with two long hairs ; dorsum with many scattered long hairs : 

 apical segment with fringe of shorter hairs; color almost uniformly 

 dark brown, the marginal blotches showing slightly darker than the 

 rest of the surface. 



Colpocephalum tigrum n. sp. 



Three males from Arcnaria melanocephala, San Martin Is- 

 land, and two from Aphrisa virgata, San Geronimo Island. 

 The described species nearest this is C. trimaculatum Piaget, 

 but the broad, complete transverse blotches of the metathorax 

 and first abdominal segment at once distinguish that species 

 from tigrum. 



Description of male. Body, length, T.6o mm.; width .64 mm.; color 

 clear with brownish blotches, producing a strikingly and unusually 

 marked Colpocephalum. 



Head, length .35 mm. ; width .42 mm. ; front broadly rounded, semi- 

 circular; four short and two medium hairs on the frontal margin, a 

 long hair on lateral margin of front; ocular fringe prominent: eye 

 distinct, with a prominent bristle; temples prominent, with three strong 

 hairs; posterior margin of occiput concave; mandibles dark brown; 

 ocular blotches dark brown, large, about twice as long as base of eye : 

 a small brown blotch on signature ; occipital bands light brown, except 

 for darker spots at base and at apex converging; space between oc- 

 cipital bands brown ; most of head with faint smoky brown color. 



Prothorax about twice as broad as long; sides angulate at anterior 

 third, with short hair at angle ; coxae showing through as brown 

 blotches; a shield-shaped brown ventral blotch, and a brown margin, 

 the rest colorless. Metathorax at broadest part as broad as base of 

 abdomen ; sides angulate at middle, the angles bearing two bristles : 

 colorless except for brown margin, a shield-shaped ventral blotch, and 

 a short brown longitudinal line at base ; coxae showing through as 

 brown blotches ; legs short, femora very thick ; a faint brown spot 

 on outer edge of femur near base, and a dark brown spot near tip 

 of tibiae; tarsi faintly yellow; legs otherwise uncolored or faintly 

 smoky. 



