NO. 13 STAPH YLINIDAE BLACKWELDER 35 



The base of the subcosta overhes the basal part of the radius as 

 shown in figure 6 A, and a short distance from the base it divides 

 into two parts. The anterior of these is the subcosta. It is continued 

 distally nearly to the hinge but is covered by the radius except near 

 the base where they overlap somewhat. Near the point at which the 

 subcosta passes under the radius, the posterior edge of the radius has 

 a small projection which approaches a projection from the cubitus and 

 is interpreted as the anterior arculus {Ant A). Apparently in nearly 

 all beetles the radius is characterized by the presence of tiny pores 

 on the dorsal surface near the arculus. These pores (fig. 7 C) appear 

 immediately distad of the separation of the radius from the subcosta. 

 They serve as a ready means of identifying this vein. The radius 

 typically arises from the second axillary sclerite, but here the base is 

 united with the subcosta and its union with the second axillary is 

 not apparent, though they do approximate each other. The radius is 

 extended distally to form the large rectangular stigma (stg) near the 

 middle of the anterior margin. A disconnected branch of radius {R2) 

 extends from near the stigma toward the tip of the wing, but it is 

 rather indefinite and not strongly sclerotized. 



Posterior to R2 is another indefinitely sclerotized area which repre- 

 sents the first branch of the media (fig. 7 A, Mi). Its basal part is 

 entirely lost, and the only other branch that remains of the media is 

 considered to be united with the distal part of the cubitus (Mi + Cu). 



The cubitus is a definite vein extending from the anterior arculus 

 (fig. 7 A, Ant A) diagonally across the wing. Its distal part is united 

 with Mi, and its proximal part with the first anal vein. There is a 

 distinct angle between these proximal and distal parts, and this point 

 approaches rather close to the base of M^ The anterior arculus is on 

 the dorsal edge of the base of the vein, and just distad of this on 

 the ventral edge is the anal arculus (AnlA). The cubitus is supposed 

 to arise from the third axillary sclerite, but this connection is not 

 apparent in this form. 



The anal veins are all very indefinite. The first anal is apparently 

 united with the proximal part of the cubitus (fig. 7 A, Cu+iA). This 

 is the vein that forms the anal arculus, which extends toward the 

 second anal vein. The second, third, and fourth anals are merely 

 darker streaks in the wing membrane. It is apparently the third (or 

 the second branch of the second) that marks the anal fan {anf). 



The surface of the wing is marked by streaks of darker color, 

 whereas the hinge (fig. 7 A, hgw) and the stigma {stg) are very dark 

 and opaque. The entire surface of the wing, both dorsally and ven- 

 trally, is covered with minute points or setulae which grade off on the 



