486 FAMILY VII. TETTIGONIIDvE. THE KATYDIDS. 



47; of hind femora, $, 22.524; $, 2325; of ovipositor, 4.55 mm. 

 Greatest width of tegmina, 13 14 mm. (Pig. 161.) 



This is the M. laurifoliuin of my previous work (1903, 354) 

 and of most American authors up to 1906, Kirby having then 

 shown that the name laurifolimti rightfully belongs to a trop- 

 ical species of Stilpnochlora. J/. rlioinbifolium is the largest of 

 our northern katydids and is frequent throughout the southern 

 half of Indiana, but has not been noted north of Lafayette, where 

 Fox (1915) says it "appears to be common since its notes were 

 heard continuously throughout late July and August." In the 



Fig. 161. Male. Natural size. (After Riley.) 



country it is most commonly called "the katydid," and the note 

 of the broad-winged katydid, PtcropJiylla camellifolia (Fab.) is 

 usually attributed to it, but its true note may be represented "by 

 the syllable 'tic,' repeated from eight to 20 times at the rate of 

 about four to the second." However, H. rhonibifolium is prob- 

 ably less common in Indiana than the broad-winged katydid, with 

 which it is confused. As it frequents low bushes and other shrub- 

 bery it is more often seen, the true katydid being commonly found 

 in the taller trees. It is often attracted to light and in Indian- 

 apolis numerous examples have been found on porches and in the 

 gutters beneath electric lights. In movement M. rhombifoUum is 

 very sluggish, seldom taking to flight when approached and read- 

 ily picked up by the fingers. It probably occurs in small numbers 

 in all parts of the State. 



About Dunedin, Fla., adults of rhombifolium have been taken 

 from November to April, but are very scarce. The nymphs in all 

 stages are, however, frequent during the winter and often taken 

 by sweeping. It occurs throughout Florida and on the southern 

 keys, adults being recorded from numerous localities and in nearly 

 every month of the year. At Miami it was noted by Hebard 

 (1915b) to be "not uncommon in early March about the town on 

 trees and shrubbery, as could be determined on warm evenings by 

 the frequently heard stridulations. On nights when the tempera- 

 ture fell at dusk below 65 all Orthopteron stridulations ceased." 



The known range of rlioiubifoliitiii extends from Staten and 

 Long Islands, N. Y., north and west to Michigan, Minnesota and 



