347 



unequally punctate, the posterior margin triangularly emargiuate, the 

 anterior margin angularly curved, the disk convexly elevated; in front 

 of it the surface is broadly depressed, having on the subraargin an in- 

 dentation in which a pair of black, impressed dots are placed, and on 

 each side two round indentations, and near the lateral margin a still 

 smaller, less distinct one; lateral angles a little prominent, the edge 

 acute. Scutellum reddish-brown, depressed in the center. Pectus yel- 

 low, the lateral pieces and sternum more or less piceous. Legs ochreous, 

 the anterior and intermediate pairs brownish or piceous, the tips of the 

 tibial spines and the ends of the tarsal joints black. Hemelytra pale 

 reddish-brown, paler at tip, an angular spot near the base in the costal 

 areole, and a large spot on the disk running to the iijner margin, as also 

 most of the clavus, piceous-blackish ; between the spots on the costal 

 areole is a large whitish spot; nervures of the apex a little ramose, dark 

 piceous; costal margin at base pale; wings pale brownish, the nervures 

 j)iceous. Venter rufo-piceous, Mdth the incisures of the segments paler. 



Length to tip of hemelytra, 6 to 7 millimeters. Width of base of pro- 

 notum, 2 to 2^ millimeters. 



Collected in Colorado by Prof. Cyrus Thomas and others. 



2. P. lineatus. 



Cicada lineata, Linn., Systema Naturae [ed. 12], 709, No. 31. 



Collected on the hills and high mountains of Colorado hj Lieutenant 

 Carpenter, and in Colorado by Prof. C. Thomas and others. This 

 species is widely distributed in North America. My friend, the 

 lamented Eobert Keunicott, collected specimens in the vicinity of the 

 Yukon River, Russian America, as well as in many x^laces along the route 

 of his expedition from the Red River of Minnesota to the region of the 

 Mackenzie River. On the eastern side of the continent, it extends from 

 the Hudson Bay region to near Chelsea, Mass. Near Portland, Me., I 

 found it to be very common on plants and low bushes in damp situa- 

 tions. It, also, inhabits Newfoundland, Nova Scotia, and Canada. A 

 variety is the AphropJiora hilineata, Say ( Journ. Acad. Phila., vi, 304). 

 It was originally described from Sweden, and has been often reported 

 from the various countries of the north of Europe, including Great 

 Britain. As I have seen specimens also from Siberia, Kamtschatka, 

 and Japan, it seems certain that this species is now spread around the 

 circuit of the globe in the north-temperate and sub-arctic regions. 



Suitable conditions of wind and current, as well as the medium of 

 commercial transportation, have furnished agencies capable of distribu- 

 ting this insect from the Asiatic continent to the North American ; and 

 the abundance of specimens occurring in the localities where it is found 

 shows how well it has adjusted itself to the variety of jDhysical con- 

 ditions with which it has had to contend. 



3. P. s])umaria. 



Cicada spumaria, Linn., Fallen Hemipt. Suecicae, 14, No. 5. • 



Originally described from Northern Europe. But it is now known 

 to inhabit also England, Germany, and Switzerland. I have examined 

 one or other of its numerous varieties from Utah, Dakota, Sitka, Lake 

 Winnipeg, and on the eastern side of the continent from Nova Scotia, 

 Canada, Maine, and New York. Near Brunswick, Me., it is quite com- 

 mon, and presents a great number of varieties, some of which are iden- 

 tical with those of England. 



