28 John Todd Zimmer 



Thyreocoris anthracinus (Uhler). 



1876. Cortmelaena anthracina Uhler, Bull. U. S. Geol. Geog. Surv. 

 Terr., No. 5, ser. 2, pp. 270-71. 



This western species, described from California, has been taken 

 twice in Sioux county, both specimens being females. Although 

 the form of the reflexed pronotal margins is quite characteristic, 

 ten specimens which I have from California, Colorado and 

 Nebraska all agree in lacking the submarginal row of setae on the 

 venter, possessed by the other species and so noticeable in ciliatus 

 and sayi. This character I have never seen mentioned in descrip- 

 tions or synopses, but it alone is sufficient to separate this species 

 from the other forms found in the state. 



Thyreocoris ciliatus (Uhler). 



1863. C orimelaena ciliata Uhler, Proc. Ent. Soc. Phil., II, p. 156. 



On July I, 191 1, I swept two males of this form from the 

 mixed vegetation of a blow-out near Imperial, Nebraska, among 

 the southwestern sandhills. One of the specimens is deep, irides- 

 cent purple in color, becoming green on the base of the pro- 

 notum ; in the other the green predominates with only a few tinges 

 of purple here and there in certain lights. The dorsal punctura- 

 ■tion is rather regular in my specimens, and the punctures are 

 connected by fine, short sulci running longitudinally, thus leaving 

 little ridges which are in turn crossed by transverse, still more 

 -jninute impressed lines which can be seen only under compara- 

 tively high magnification. This condition prevails most notice- 

 ably on the scutellum and gives the dorsal surface a rather peculiar 

 finish. 



Thyreocoris lateralis (Fabricius). 



1803. Tetyra lateralis Fabricius, Syst. Rhyng., p. 142. 

 1904. Corimelaena Gillettii VanDuzee, Trans. Am. Ent. Soc, XXX, 

 p. 8. 



Easily identified by the form of the pale margin of the corium 

 which is narrowed instead of expanded basally, although in the 

 following species some individuals have the portion between the 

 inner angle of the pale spot and the cubital suture with con- 

 spicuously darker punctures, a semi-approach to the coloration of 



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