1878.] 387 [Utter. 



Another specimen, with printed label No. 522, is a male of the va- 

 riety with orange hemelytra. The species is common all over the 

 eastern side of the North American continent, from Maine to Florida, 

 and thence through the West Indies, Mexico, and Central America 

 to Brazil. 



MYODOCHINA. 



Ptochiomera Say. 

 P. nodosa. 



Ptochiomera nodosus Say, Heteropt. New Harmony, 18, 9. Apha- 

 nus clavatus Dallas, Brit. Mus. Cat. Hemipt., 590, 5. 



No. 144, Harris' Collection. "Alabama, February, Prof. Hentz, 

 and North Carolina." 



M.M. Amyot and Serville, in their " Histoire naturelle des In- 

 sectes: Hemipteres " have employed the term Plociomerus, placing 

 Say's name after it, for a genus represented by the European Pacliy- 

 merus fracticollis Schill. This is in no sense equivalent to the genus 

 Ptochiomera of Say, and should not be confused with it because of 

 similarity of spelling. More recently Dr. Stal has used the name 

 Ligyrocoris in its stead, and referred to it two of our common species 

 described by Say in his genus Pamera. However, as the latter au- 

 thor has failed to characterize that genus, it cannot stand ; and the 

 species included in it will be distributed to the different genera in 

 which they belong. 



In 1861 Dr. Fieber, in his " Europ'aischen Hemiptera," employed 



the name Plociomerus for four European species, including the P. 



fraticollis Schill., and our Ligyrocoris silvestris Linn.; hence if the 



genus of M.M. Amyot and Serville must be set aside, that of Dr. 



Stal must be substituted for it. 



The Ptocliiomera nodosa is quite common beneath stones, etc., in 

 fields and meadows in early spring, and like Micropus falicus and 

 Blissus leucopterus often has the hemelytra and wings short or unde- 

 veloped. 



Cnemodus H.-Schf. 

 C. mavortius. 



Astemma mavortia Say, Heteropt. New Harmony, 1Q.- Cnemodus 

 brevipennis H.-Schf., Wanz. Ins., ix, 184, pi. 309, fig. 948. 

 No. 118, Harris' Collection, "d, Cambridge, Randall." 

 Determined by Mr. Say. 

 Extremely common in sheltered places beneath stones, fallen leave 



