38 U.S. NATIONAL MUSEUM BULLETIN 290 



though the Texas specimens are slightly smaller and the vittae usually 

 are more reddish. The Texasjspecimens that I accept as males of 

 bispinus are shghtly lighter in color and average a little larger than 

 males of calidus, but I find no reliable external characters|for dis- 

 tinguishing the two. I suspect that southeastern males of bispinus 

 are mixed with calidus in our material. C. calidus occurs within the 

 eastern range of bispinus, and I am unable to distinguish the male of 

 bispinus from males of calidus from this region. Because the un- 

 recognized males of bispinus from the southeast are not provided for in 

 the key, they are likely to key to calidus. Males of bispinus from 

 Texas wiU run to the correct name in the key. 



Collection notes record specimens as taken on sugarcane, in cotton 

 fields, and on Stillingia sylvatica L. 



Distribution. — The 42 specimens examined are from Florida, 

 Alabama, Georgia, and Texas. 



Cryptocephalus bivius Newman 



Figures 4, 62, 113 

 Cryptocephalus bivius Newman, 1840, p. 249. 



Pronotum: Creamy yellow to orange with four longitudmal, 

 sharply delimited, usually more or less parallel-sided black vittae 

 from base to apex, and a small black spot on each side; lateral two 

 vittae may be slightly sinuate, a little expanded, or reduced. Puncta- 

 tion dual, larger punctures small to minute, sometimes coarse. 



Elytra: Creamy yellow to orange, usually lighter at sides and apex, 

 with sharply delimited black markings. Dark markings as follows: at 

 side a rather large, basal spot centered behind humerus (frequently 

 reduced to one or two spots); a common, transverse spot centered 

 before apex of sutural stria, usually attaining fourth interval, some- 

 times reduced; a common sutural spot centered before union of first 

 and second striae, sometimes reduced to two spots or absent; an oval 

 spot at each side just behind middle, usually extending from fifth to 

 eighth interval, sometimes reduced, never absent; infrequently some 

 markings confluent; at extreme of least development, pattern with 

 rather small humeral and lateral spots and two small apical spots. 

 With eight rows of punctures, sixth and seventh rows confused, fifth 

 row sometimes reduced, punctures larger, sparser than usual, finer to 

 apex; inner and outer rows distinct at apex, usually clearly meeting. 



Prosternum: Anterior margin in male produced mto a short V- 

 shaped lobe, anterior margin in female evenly arcuate. 



Length: 4.3 to 6.4 mm. 



Distribution. — All 36 specimens in the U.S. National Museum 

 are from Florida and Georgia. 



