March, 1906.] CaUDELL : CVRTOPHYLLI OF THE UNITED STATES. 39 



tinctness of the transverse sulci of the thorax. Were all these minor 

 points of difference considered the number of species would be unde- 

 sirably multiplied. 



The C. zimmermanni of Saussure is placed as a synonym of this 

 species with considerable certainty. The posteriorly angulate pronotum 

 prohibits its being P. robustus and the oval elytra of the female indi- 

 cates its identity with perspicillatus rather than with any of the follow- 

 ing species. The correctness of this conclusion is also indicated by 

 the pronotum being described as rugose, a condition more obvious in 

 perspicillatus than in the other species. The habitat, however, is more 

 southern than common with concavus and an examination of the type 

 might show it to belong elsewhere. But according to the only evi- 

 dence available, that of the printed description, it is most appropri- 

 ately placed here. 



Gryllus perspicillatus of Linnaeus, Amcen. Acad, vi, 398 (1763), 

 which has been referred here by Scudder, does not belong to this 

 group at all. It is, so far as I know, an unidentifiable nymph and 

 is referred to by Fabricius in the same work in which the insect now 

 under discussion was described. 



C. hypericifolia Stoll, which was described from Surinam, has been 

 referred to the synonomy under perspicillatus, but probably errone- 

 ously so, as it is scarcely likely that a species from Surinam would ex- 

 tend into our region. However the locality may have been wrongly 

 given in Stoll's description, in which case his species may well be re- 

 ferred here, as the figure or description presents no discordant features. 



This species is better known than any other member of the group 

 and yet comparatively little is known of it, except as regards its song. 

 Many writers have written accounts, poetic and otherwise, of the song 

 of the katydid. The number of notes are said to bear a certain rela- 

 tion to the temperature, as previously mentioned. 



All that is known of the breeding habits of this species has been 

 previously discussed. Harris, Ins. Inj. to Vegetation, has described 

 the eggs of Microcentrum as those of this species. Riley, Missouri 

 Report, v, p. 123, describes the true eggs as follows : 



" .25-. 30 inches long, very flat, over thrice as long as wide, pointed at each end, 

 with the edges beveled oft" or emarginate. They are of a dark slate-color and are 

 thrust into crevices and into the softer parts of bark or of stems. The lower or first 

 inserted end is protected by a dark adhesive substance, which hardens and sometimes 

 extends the whole length of one of the borders ; and several eggs are usually pressed 

 close to each other." 



