46 PROCEEDINGS OF THE NATIONAL MUSEUM vol.82 



This variety is not confined to Texas but extends southward into 

 Mexico and westward to Arizona. There are also specimens from 

 Virginia that are larger and with more pronounced punctation, 

 but not so distinct as in discoidea. 



Several cliaracters seem to indicate that leptolineata is specifi- 

 cally distinct from discoidea: (1) The punctation is never so heavy 

 as in discoidea; (2) the aedeagus has a little more slender tip; and 

 (3) no form of Jeptolineata is yet known in which the elytral vittae 

 coalesce to form a discoidal spot. 



19. DISONYCHA ANTENNATA Jacoby 



Plate 5, Figure 28 



Disonycha antennata Jacoby, Biol. Centr. Amer., vol. 6, pt. 1, p. 35, 1884 (Mex- 

 ico; type not designated). 



Disonycha albida Blatchley, Can. Ent., vol. 56, p. 169, 1924 (Big Fine Key, 

 Fla. ; type in collection of W, T. Davis), 



Descinption. — Broadly oblong oval, smooth, somewhat shining, 

 entirely pale except for dark antennae, dark streak on outside of 

 tibiae, and dark tarsi. Head with interocular space more than half 

 width of head ; carina broadly rounded, slightly produced, tubercles 

 not prominent, smooth and shining, usually impunctate or nearly so 

 with a large fovea on each side near eye; pale, except sometimes 

 a darkened tip to mandibles. Antennae short, robust, dark with paler 

 basal joints, third point shorter than fourth or fifth, which are 

 subequal with the fourth slightly longer. Prothorax about twice as 

 wide as long, somewhat convex, narrowed a little anteriorly with 

 slightly arcuate sides; finely alutaceous, very indistinctly punctate, 

 entirely pale. Scutellum pale. Elytra broadly oblong oval, some- 

 what convex, humeri not prominent, with a short intrahumeral 

 sulcus; surface somewhat shining, under high magnification finely 

 alutaceous, very finely punctate, entirely pale. Body beneath 

 sparsely and inconspicuously pubescent, entirely pale ; tibiae with a 

 dark outer streak, or only apex darkened, tarsi dark. Length, 

 6.5 to 7.6 mm; width, 3.6 to 4.2 mm. 



Type locality. — Type not designated but the following localities 

 given: Mexico (Ventanas, Cordova, Vera Cruz, Panistlahuaca, 

 Jalapa). 



Distribution. — Florida (Big Pine Key) ; Mexico. 



Food plant. — Unknown. 



Remarks. — Only two specimens of this pale species taken in the 

 United States are known to me, one, the type of D. alhida., in the 

 collection of W. T. Davis, and the other in the National Museum, 

 taken by H. S. Barber, both collected on Big Pine Key. It is a 

 Mexican species which may have taken foothold at the tip of Flor- 



