348 SAMUEL II. SCUDDEtt ON THE 



Fulg. lebachensis Gold, and F. Klieveri Gold, are probably bind wings of Palaeoblatta- 

 riae. I may remark that Goldenberg left behind bim a drawing, now in my possession, in 

 which he tried to restore the latter so as to make it fit the wing of a Gerablattina. Macro- 

 phlebium Hollebeni Gold, seems tome also most probably the hind wing of a cockroach, and 

 the supposed separation line between a basal and distal area (corium and membrane) an 

 accidental circumstance. 



C 



The two forms conceded above to belong in this section of Palaeodictyoptera seem to 

 foreshadow the homopterous rather than the heterop'terous division of hemipterous insects. 

 The reverse is the case with the interesting species next to be described. 



Phthanocoris occidentalis (<t>8avu, ko'pis) gen. et spec. nov. PL 32, fig. 4. 



Phthanocoris occidentalis Scudd., Proc. Bost. Soc. Nat. Hist., xx. 08-59. 



A perfect front wing of moderately large size, nowhere very broad, and less than three 

 times as long as broad. The corium occupies rather more than three quarters of the wing, 

 separated from the membrane by an oblique sinuous line running from a point on the 

 lower margin about three-fifths the distance from the base, and reaching the costal margin 

 only a little before the tip. Beyond the basal fourth the costal margin is very regularly 

 and gently arched. The inner margin is strongly rounded next the base, beyond that 

 to the end of the corium straight, with a scarcely perceptible turn outward where it strikes 

 it; beyond this forming with the apical margin a regularly convex curve, the apex of 

 the wing tailing in the middle of the upper two-thirds and the greatest breadth of the wing 

 being twice its width near the base. All the principal veins are stout and prominent, but 

 especially is this the case with the mediastinal and scapular. The marginal vein forms the 

 costal border. The mediastinal is simple and follows the curve of the margin, constantly 

 and very gradually approaching it and finally blending imperceptibly into it just before the 

 extremity of the corium, or in the middle of the downward slope of the margin. The 

 scapular vein is the stoutest and most prominent in the wing ; it originates scarcely above 

 the middle of the base (the mediastinal midway between it and the margin), and runs par- 

 allel to the mediastinal until it divides, a little beyond the basal third of the wing ; its infe- 

 rior branch here recovers the straight course of the extreme base of the vein and retains it 

 to the extremity of the corium, scarcely turning upward at the end and gradually losing 

 its prominence ; while the upper branch or main vein curves upward, very gradually and 

 very slightly approaching the mediastinal vein until it reaches the upper limit of its con- 

 vexity, and then runs parallel to it, terminating in the margin at the extremity of the corium. 

 The externomedian vein originates just below the middle of the base of the wing and runs 

 in a straight course down the middle of the wing to the end of the corium ; it is the least 

 promiment vein in the wing but occupies most space, filling the area below it with somewhat 

 approximate, parallel, straight, oblique veins, most or all of which originate from a principal 

 branch which runs parallel and near to the main vein. The internomedian vein, or sutura 

 clavi, runs from the base of the last vein to the inner extremity of the corium a little 

 beyond the end of the middle third of the wing in a straight line, curving very slightly 



