151 



The lateral carina' of pronotum are much sharper in this species than 

 in the next; the pronotum itself is a little longer, and appears more so 

 than it really is on account of the broadly rounded posterior lobe. The 

 latter has in the female a faint median carina which is absent in dorsalis. 

 The hind femora, as well as the ovipositor, are a little shorter than in that 

 species, and the apex of the ovipositor is more bluntly rounded from above. 



Measurements : Male— Length of body, 20 mm.; of pronotum, 10 mm.; 

 of hind femora, 10 mm. Female— Length of body, 22 mm.; of pronotum, 

 mm.; of hind femora, IS mm.; of ovipositor 17 mm. 



PacJiymerus is, in Indiana, by far the more common of the two species 

 known to occur. So far it has been noted only in Putnam and Vigo 

 counties, but undoubtedly is to be found throughout the State, frequent- 

 ing the localities mentioned above under the generic description. In a 

 pleasing account of the note and habits of the species, Mr. W. T. Davis 

 says as follows: "Its song much resembles that of Orchelimum vulgare, 

 with the preliminary zip, zip, omitted. It is a continuous z-e-e-e, with an 

 occasior»al short ik, caused by the insect getting its wing covers ready for 

 action after a period of silence. * :;: Starting with raspberries, 



one kept in captivity had the rest of the fruits in their season, including 

 watermelon, of which he showed marked appreciation. If I offered him 

 a raspberry and then gradually drew it away he would follow in the di- 

 rection of the departing fruit, and would finally eat it from my hand." 



aa. Front margin of pronotum but little narrowed, about three- fourths 

 the width of the hind margin, the latter almost square. 

 39. Thyreoxotus dorsalis, (Burmeister.) 



Decticw dorsalis, Burmeister, Handb. der Entom., II., 1838, 713. 

 Thyreonotus dorsalis, Scudder, Bost. Journ. Nat. Hist., VII., 1802, 454. 

 Id., Distb. Ins. X. Hamp., 1874, 370. 

 Id., Proc. Bost. Soc. Xat. Hist., XIX., 1877, 8:1. 

 Id., Ent. Notes, VI., 1878, 24. 

 Comstock, Int. Ent., I., 1888, 118. 

 Fernald, Orth. X. Eng., 1888, 26. 

 Smith, Ins. X. Jer., 1890, 411. 

 Color: Female — Dull, yellowish brown; the posterior lobe of prono- 

 tum, dorsum of abdomen and ovipositor dark brown. A blackish spot 

 on the face below each eye; the sides of the pronotum with obsolete 

 fuscous markings. The chief structural distinctions between this insect 

 and PacJiymerus are given above under the latter species. 



