REHN AND HEBARD 91 



Atlanticus glaber Rehn and Hcbard (PI. VI, figs. 18 and 24; pi. YII, 



figs. 8, 17 and 26; pi. VIII, figs. 10 and 18.) 

 1877. Thyreonotiis dorsalis Scudder, Proc. Boston Soc. Nat. Hist, xix, p. 83. 



(Part.) [Fort Reed, Florida.] 

 1905. Atlanticus sp. Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 1905, 



p. 48. [Miami and Tampa, Florida.] 

 1912. Atlanticus glaber Rehn and Hebard, Ibid., 1912, p. 269, figs. 20 to 22. 



[Miami and Homestead, Florida.] 



There is little to add to the description of this species, except 

 a few slight amplifications and additions. The pronotum is 

 uniform in shape as described and figured, except that the Marco 

 and several Miami males show no trace of a sinus indentation 

 in the caudal margin of the lateral lobes. The caudal section 

 of the pronotal disk has a trace of a median carina. The tegmina 

 in the male type do not exceed the caudal margin of the pronotal 

 disk, those of a number of the other males in the series slightly 

 surpass the same; the form of the tegmen is characteristic, the 

 mirror of medium size. Disto-dorsal abdominal segment in 

 both sexes nearly rectangulate-emarginate, varying somewhat 

 individually in this respect, the lateral angles bordering the same 

 moderately produced; supra-anal plate of male rectangulate, some- 

 times with a rotundate tendency, of the female acute-angulate, with 

 a medio-longitudinal sulcus on the greater (proximal) portion 

 of its length. Subgenital plate of male acute- to rectangulate 

 emarginate; styles of medium length, slender. Ovipositor vary- 

 ing slightly in depth and in length, faintly decurved in the Marco 

 female, the apex ventral or submedian. Subgenital plate of 

 the female rather broadly U-emarginate, the lateral angles 

 rotundate-subacute. Caudal femora with four to nine spines 

 on the ventro-internal margin. Medio-internal distal spur of 

 the caudal tibiae slightly more than twice as long as the ventro- 

 internal spur. 



Color Notes. — The following notes are supplementary to those 

 given in the original description. The pale dorsal coloration is 

 occasionally (two males, Marco and Miami) entirely uniform 

 pale chestnut (between burnt sienna and chestnut of Ridgway); 

 the same area may bear a closely placed median pair of fine 

 medio-longitudinal lines (weak in allotype, pronounced in Marco 

 female and one Miami male and several immature specimens), 

 while the black maculations on the sides of the abdomen may be 



TRANS. AM. ENT. SOC, XLII. 



