AKT. 2 EEYISION" OF TRIEHABDA NORTH OF MEXICO BLAKE 29 



coarsely punctate, and with dense pale pubescence over occiput ; basal 

 plaga wide, dark green with metallic luster, not usually encircling 

 eyes. Antennae with third joint shorter than fifth. Prothorax 

 barely twice as broad as long, with sides arcuate, sometimes very 

 feebly angulate at middle; densely, coarsely punctate, usually with 

 fairly dense pubescence; spots moderately large and usually lacking 

 metallic luster. Scutellum black, frequently in paler (vittate) speci- 

 mens with pale margin. Elytra covered with silky pubescence, hid- 

 ing the fine, dense punctation; sometimes entirely shining blue or 

 green with pale margin, sometimes with lateral, sutural, and often 

 traces of median vittae, as in diducta (no specimens seen in which 

 lateral and sutural vittae were not united at apex). Body beneath 

 pale with only margin of metasternum and abdomen darker, a spot 

 on outer femora also frequently dark metallic in color in darker 

 specimens. Length, 6.8 mm. to 8 mm.; width, 2,8 mm. to 3.5 mm. 



^2/^6.— Collected at San Diego, Calif. U.S.N.M. No. 43023 (in 

 Casey collection) (with 15 paratypes). 



Distribution. — California (Los Angeles, Pasadena, Redondo, 

 Santa Barbara County, Independence, Warners Hot Springs, Bishop. 

 Red Bluff). 



Food flant. — Artemisia calif ornica Lessing. 



Remarks. — This species has alwa^^s been confounded with luteo- 

 cincta^ which it resembles in general shape and coloring. It differs 

 from that species, however, in being somewhat smaller and in having 

 a much more coarsely punctate and pubescent thorax, and in having 

 a paler scutellum and ventral surface. The aedeagus is also utterly 

 different in shape from that of luteocincta. The species ranges from 

 tlie seacoast of southern California northward through the Sierras. 



19. TRIRHABDA FLAVOLIMBATA (Mannerheim) 

 Plate 2, Figure 19 



GaUenica flavolimbata Mannekheim, Bull. Moscou, vol. 16, part. 2, p. 308, 1843. 

 Trirhahda flavolimbata LeConte, Proc. Acad. Nat. Sei. Philadelphia, vol. 17, 

 p. 220, 1865. 



Description'. — Robust, of medium size, oblong (in females some- 

 what oval), pale with shining metallic-green or blue plaga across 

 base of head, dark spots with metallic luster on pronotum, and 

 elytra entirely blue or green except for pale margin. Head mod- 

 erately coarsely punctate, lightly pubescent, a wide plaga with 

 metallic luster over base of head curving down front, but not 

 encircling eyes. Antennae with third joint shorter than fifth. 

 Prothorax scarcely twice as broad as long, with sides feebly arcuate, 

 not at all angulate, shining, with scattered coarse punctures; spots 

 usually large and with inconspicuous metallic luster. Scutellum 



