216 SCUDDER ON THE CARBONIFEROUS 



however is of a much darker shade, the markings consisting mainly of three broad trans- 

 verse belts, which cross tbe wing from the scapular vein to the lower margin, one near 

 the middle of tbe wing and one near the middle of either half; these, and especially the 

 outer two, are of a distinct though dull umber brown ; the same deep tint is also found 

 throughout the space between the scapular vein and its main parallel branch, but the 

 whole costal margin above the scapular vein is hyaline ; the apex of the wing, which is 

 lost, was probably tipped with the dark color. Of the three transverse belts the outer- 

 most is pretty regularly transverse, its inner margin following an irregular zigzag course, 

 generally at right angles to the costal margin, from the base of the third offshoot of the 

 main scapular branch to the tip of the lower externomedian branch ; its outer margin fol- 

 lows a similar direction downward from the base of the fourth offshoot of the main scap- 

 ular branch, until it reaches the second offshoot, when it follows that outward (to the 

 broken part of the wing). The middle transverse belt is less regular, being nearly broken 

 in the middle, its lower half hardly more than half as broad as its upper half and thrust 

 a little further outward ; the upper half is seated on the extreme base of the upper 

 externomedian branch and, broadening upward, reaches from near the base of the first off- 

 shoot of the main scapular branch to nearly midway between the second and third offshoot ; 

 the lower half is equal and tolerably regular, its middle lino opposite the lower termina- 

 tion of the outer margin of the upper half, its outer margin terminating below at the tip of the 

 internomedian vein. The inner belt is broken into three fragments; the upper, between 

 the scapular and externomedian veins, reaches from where these veins begin to diverge 

 to the extremity of the curved cross-vein uniting the two veins ; the second, between the 

 externomedian and internomedian veins, extends in neither direction so far as the one 

 above, and is terminated outwardly by a distinct and oblique cross-vein ; the third occupies 

 the outer half of the anal area. Besides there are a few dark cloudy spots at the base, 

 one following the lower edge of the internomedian vein, and others parts of the anal veins. 

 The heavier cross-veins, besides the one referred to in the generic description, at the 

 base of the main scapular branch, are the following : In the scapular area, four equidistant 

 transverse veins between the main stem and the main branch ; two approximate transverse 

 veins between the third and fourth offshoots of the main branch, — both in the outer dark 

 belt and the outer forming its outer margin ; one in the same belt in the interspace below, 

 and in continuation of the inner of the transverse veins above it ; one in the middle belt, 

 oblique to the nervures but at right angles to the costal margin, between the scapular and 

 externomedian veins; two others in the same interspace in the outer belt, a little oblique to 

 the nervures, in the opposite sense to the preceding ; two others in continuation of these, 

 but transverse to the nervures between the externomedian branches; another in the same 

 interspace in the middle belt, also transverse ; one in continuation of this, in the interspace 

 below, forming the inner margin of the middle belt, besides another outside of it in the ex- 

 terno-intsrnoinedian interspace, both transverse, and one in the same interspace, very oblique, 

 forming the outer margin of the inner belt ; two in the interspace below, one oblique, its 

 lower extremity at the tip of the anal vein, the other transverse, above the middle of the 

 lower spot of the inner belt ; and finally one, very oblique, in continuation of the preced- 

 ing. It thus appears that all the heavy cross nervules fall in the three transverse dark 

 belts and that witli few exceptions those which are oblique to the neighboring longitudinal 



