^RT. 28 REVISIOlSr OF DISONYCHA NORTH OF MEXICO BLAKE 47 



ida on Bio- Pine Key, but Nvliich cannot yet be very abundant there. 

 It belongs to the discoidea group, being very closely related struc- 

 turally. The aedeagus is very much like that of discoidea and 

 leptolineata. No other species of Disonycha in the United States 

 is so pale as this. D. f^gurata^ another pale Mexican species that 

 has crept into the United States only in Arizona and Nevada, has 

 two dark pronotal spots and indistinct elytral vittae. 



20. DISONYCHA ALABAMAE Schaeffcr 



Plate G, Figure 29 



Disonycha alaiamae Schaeffbhi, Joiirn. New York Ent. Soc, vol. 27, p. 337, 1919 

 (Citronella, Ala.; type in collection of Charles Schaeffer). 



DescH-ptlon. — Small (5 mm), oblong oval, feebly shining, pale with 

 dark labrum, tibiae, tarsi, and elytral vittae; the wide median vitta 

 on each elytron considerably nearer to the submarginal vitta than to 

 the sutural. Head with interocular space more than half width of 

 head; tubercles somewhat swollen, carina broadly rounded and 

 slightly produced ; occiput smooth in middle with punctures on each 

 side and the usual fovea near eye; pale with dark labrum. An- 

 tennae dark with paler basal joints, third, fourth, and fifth joints 

 subequal, the fourth slightly the longest. Prothorax over twice as 

 broad as long, somewhat convex, narrowed anteriorly with sides 

 arcuate; not shining, distinctly alutaceous, with fine, rather dense 

 punctation; entirely pale. Scutellum black, more rounded than in 

 admirahilis. Elytra oval, not very convex, with humeri not at all 

 prominent; surface alutaceous, finely and shallowly but distinctly 

 punctate ; sutural and submarginal vittae not united, the median one 

 wide and placed closer to the submarginal vitta than to the sutural, 

 the intervening pale space between it and the submarginal vitta being 

 very narrow. Body beneath indistinctly and rather sparsely pubes- 

 cent; entirely pale, the apex of tibiae and tarsi dark. Length, 5 

 mm ; width, 2.5 mm. 



Type ZocaZzVy.— Citronella, Ala., collected by H. P. Loding. 



Distribution. — Alabama (Citronella); Texas (Columbus). 



Food plant. — Unknown. 



Remarks. — Although I have not dissected a male of this species, 

 I am convinced that it is distinct from both admirahUis and arizoime., 

 the two species that it resembles most closely. It differs from ad- 

 miraUlis in having antennal joints 3, 4, and 5 subequal (in admira- 

 hUis the third joint is decidedly shorter than the fourth), in having 

 the prothorax more distinctly alutaceous and punctate, and in having 

 the undersurface sparsely and indistinctly pubescent. It is dis- 

 tinguished from arizonae by its more oval shape, by having longer 

 antennae, and by having the frontal tubercles more pronounced. It 



