32 MEMOIRS ON THE COLEOPTERA 



marking to remain when the elytra become otherwise wholly pale; 

 body smaller and more abbreviated in form, also more inflated pos- 

 teriorly; color blackish, the abdomen, femora and prosternum paler; 

 head dark, paler anteriorly and on the clypeus, densely, rugulosely 

 punctate, sparsely punctate basally. the eyes small in both sexes; 

 clypeus transversely semi-elliptical, the edges very moderately 

 reflexed; antennal club three-fourths the length of the stem (cf ), 

 two-thirds (9 ); prothorax twice as wide as the median length (9 ), 

 distinctly less (cT), black and feebly submetallic, with pale sides, 

 to pale, with a large transverse, posteriorly angulate apical spot, 

 the sides broadly, subevenly rounded and converging to the sinuate 

 apex, the apical angles prominent and acute, the basal moderately 

 rounded; basal bead very fine, entire; surface slightly uneven, 

 convex, strongly, deeply and moderately closely punctate, the scutel- 

 lum sparsely and less strongly; elytra wholly pale or with two more 

 or less developed transverse wavy fasciae of blackish tint, only a little 

 longer than wide, the even impressed striae close-set and rather 

 coarsely, deeply punctate to the sides; second interval alone broad- 

 ened, coarsely and confusedly punctate throughout; pygidium 

 generally with a marginal impression at each side, convex, rather 

 dull, the transverse scratches rather strong, not very dense but 

 anastomosing; sterna glabrous. Male with the larger anterior claw 

 abruptly bent at base, rather stout and slightly swollen internally, 

 cleft apically nearly to the middle, the upper ramus very long, 

 unusually diverging, nearly as long as the lower but much more 

 slender and aciculate; female with the same claw more slender and 

 almost symmetrically bifid at tip, the incisure less deep. Length 

 (cf 9 ) 7.0-8.0 mm.; width 3.8-4.4 mm. Virginia to Florida (Palm 

 Beach) and westward to Kansas and Nebraska. Abundant. 

 [Euchlora maculata Cast., and Melolontha varians Fabr. (pars), 



nomina praeocc.] undulata Mels. 



Elytra never with the small rounded subapical spot; body larger, more 

 convex and much more elongate in the typical form. Elongate-oval, 

 shining, pale luteo-flavate, the head rufous, black basally, the pro- 

 notum black, pale at the sides and sometimes along the'base medially, 

 the elytra with two irregular fasciae of detached elongate spots; 

 under surface wholly black, except the abdominal apex, to wholly 

 pale, the legs pale with blackish tarsi; head and pronotum generally 

 with feeble metallic lustre; head and clypeus less densely sculptured, 

 sparsely punctate basally, the clypeus shorter and more trapezoidal, 

 with rounded angles; eyes rather small; antennal club nearly as in 

 ^lndulata but thicker and still shorter in both sexes; prothorax much 

 less abbreviated, only three-fifths to two-thirds wider than long, the 

 surface smoother and more even and with the punctures very much 

 finer and sparser, otherwise nearly similar, except that the entire 

 basal bead is less fine and flatter; scutellum much more strongly 

 and closely punctate than the pronotum; elytra much more elongate, 

 broader in the male, a fourth to two-fifths longer than wide; striation 

 as in iindulata but finer and feebler, the strial punctures much smaller, 

 the broad second interval with the broadly confused punctures smaller 



