10 



femur being the longest; the tibia, which is rather slim; 

 and the tarsus, consisting of five segments, the last of which 

 terminates in a pair of claws. There is a tibial epiphysis 

 near the end of the fore tibia (Plate A, tigs. 5 and 6), which 

 is armed with bristles on the inner side. The tibia of the 

 middle leg has a pair of spurs at the end, the outer of which 

 is about two-thirds as long as the inner, and the hind tibia 

 has a pair at the end and a similar pair at the outer third. 



The fore wings are long and narrow in most of the species, 

 while the hind wings are broad. I have adopted in this 

 work the old system of numbering the veins, at the risk of 

 being considered behind the times, for the reason that, not- 

 withstanding we have recently been given several systems 

 or modifications of nomenclature by authors in whom I have 

 great confidence, I must confess that as yet I am undecided 

 which one should be taken. The old system of venation of 

 Herrich-Schaffer is shown in the wings of Orambus pascuettus 

 (Plate B, figs. 1 and 2). The cell in the fore wings is closed, 

 but in the hind wings it is closed in some species and open 

 in others. The frenulum of the hind wing is single in both 

 sexes, though there is an indication at the base that it is com- 

 posed of several bristles fused together (Plate B, fig. 13, male, 

 fig. 14, female). 



The veins terminate at the margins of the wings in a rather 

 indefinite way, but at a short distance from the end there 

 are two circular spots on each vein, with short irregular 

 lines radiating from them (Plate A, fig. 11). There is a 

 row of peculiar spines around the outer margin, which are 

 placed at equal distances from each other and arise very near 

 the edge of the wing (Plate A, fig. 11, s). Near the base 

 of the hind margin of the fore wing, on the under side, 

 is a small, oval, spiny area (Plate B, fig. 11). There are 

 no scales on this area, but it is covered with short, sharp 

 spines, which point toward the outer end of the wing. A 

 portion of this area, with a few of the adjacent scales, is 

 shown on Plate B, fig. 12. This area is so placed that 

 when the wings are closed it rests upon the similar area 

 on the side of the metascutum, already mentioned, and the 

 spines on the two areas then point in opposite directions. 

 My assistant, Mr. R. A. Cooley, a most careful and pains- 



