GALERUCINE BEETLES — BLAKE 245 



Head with the interocular space approximately half width of head, 

 occiput smooth, shining, with few punctures, the frontal tubercles 

 swollen, lower front short, a short carina, entirely dark piceous. 

 Antennae not extending to the middle of the elytra, third joint not 

 so long as second, fourth the longest, remainder gradually decreasing 

 in length and the foiu- apical joints short and broad, deep brown. 

 Prothorax only a bit wider than long with nearly straight sides, 

 slightly depressed in the basal half, shining, impunctate, piceous. 

 Scutellura piceous. Elytra a little depressed, mth a short intra- 

 humeral sulcus, rather coarsely and rugosely punctate, shining dark 

 piceous. Body beneath entirely dark, frontal cavities open, claws 

 appendiculate. Length 3 mm.; width 1.5 mm. 



Type, male, CAS, from Coyote Cove, Conception Bay, Lower 

 California, collected Oct. 1, 1941, by Ross and Bohart. 



Remarks: Only a single male so far is known. It differs from the 

 North American species of Luperosoma in having a dark instead of 

 a pale pronotum. 



Luperosoma parvulum (Jacoby) 



Figure 20 



Luperus parvulus Jacoby, in Godman and Salvin, Biologia Centrali-Americana, 

 Coleoptera, vol. 6, pt. 1, p. 597, 1888. 



Between 2.5 and 3 mm. in length, elongate oblong oval, very shiny, 

 the prothorax very finely and the elytra more distinctly and thickly 

 punctate, the punctm*es becoming invisible on the sides and near 

 apex, deep bluish black, the antennae and legs deep brownish piceous, 

 in the male the middle tibiae excised and the last two joints of the 

 antennae thickened, prothorax without visible depression on the disc. 



Head with interocular space about half width of head, frontal 

 tubercles swollen and a transverse depression over them, carina 

 broad and flattish, lower front entirely dark, shining. Antennae 

 extending to the middle of the elytra, the tlrree basal joints dark 

 reddish brown, remainder covered with pale pubescence and possibly 

 a little darker. Second joint a little longer than third, fourth joint 

 about equal to second and third together, rest subequal, gi*adually 

 widening so that the tenth and eleventh joints are quite heavy. Pro- 

 thorax only a little wider than long with slightly curved sides, not at all 

 depressed although not very convex, but smoothly rounded, surface 

 very finely punctate becoming more densely and distinctly punctate 

 near the bottom, entii-ely shiny dark bluish black. Scutellum dark. 

 Elytra narrowly elongate, smooth with a short intrahiuneral sulcus, 

 strongly punctate along the suture, in the base wath transverse 

 wrinkles near the sutm'e, punctation tending to be striate and be- 

 coming evanescent on sides and below the middle; shining dark blue. 



