296 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



tarsus distinctly longer than the tibia. Antenna short, extremely 

 stout, the joints near the apex as broad or broader than long. Length 

 of the fragment, 14.75 mm.; of head and prothorax about 4.50 mm.; 

 of the fore tibia, 2.65 mm.; of the fore tarsus, 3.50 mm.; of antenna, 

 straightened, about 8 mm. 



Type.— Cat. No. 59659, U.S.N.M. 



By the heavy antennae, this species reminds one of the recent L. 

 hrevicornis, but it is probable, allowing for possible flattening through 

 pressure, that they were even broader than in that insect. The 

 antenna and the tibia both show some signs of carination, but I believe 

 these marks are accidental or due to some peculiarity in the decom- 

 position of the exoskeleton. It will be readily recognized, among 

 fossil forms, by the stout antennse. Quite probably, this insect is 

 not strictly congeneric with our recent Lepturae. Owing to the poor 

 condition of the type, and its hazy outlines, I have not attempted to 

 figure it. 



Genus SYSTENA Chevrolat. 



SYSTENA FLORISSANTENSIS, new species. 



Plate 25, fig. 5. 



Preserved in ventral view. Form rather stout for this genus, but 

 not especially so. Head moderate, width equal to about one and one- 

 half times the length, eyes not definable, antennse filiform, slender, not 

 showing the basal joints, but the remainder are subequal in length 

 among themselves, except that the distal five are somewhat shorter 

 than those nearer the head. Prothorax transverse, slightly narrowed 

 anteriorly, the sides slightly arcuate, anterior margin faintly emargi- 

 nate, posterior apparently lobed, but the appearance may be due to 

 the tip of the prosternum being bent out straight instead of resting in 

 the normal position. Anterior coxse well separated, but their other 

 boundaries not certainly defined. Meso and metasternal side pieces 

 similar to those of recent Systenae, as will be seen by reference to the 

 figure, middle and hind coxae transverse, the former obliquely so, 

 both pairs well separated. Metasternum broad. Abdomen with the 

 first and last visible segments longer than the intermediate, but the 

 first is not excessively lengthened. Legs lacking, except one posterior 

 femur which is only moderately thickened. Length, 6.30 mm. 



TVpe.— Cat. No. 59660, U.S.N.M. 



One specimen. The generic reference is open to some question, the 

 most dubious feature, in my estimation, bemg the antennal structure. 

 These organs are imperfectly preserved, but may possibly have been 

 only 10-jointed, while in Systena there are 11 joints. In other 

 respects, the generic correspondence is sufficiently close. The insect 

 had well-developed functional wings, which are seen partly unfolded 

 and extending beyond the elytral apices. 



