ORTHOPTERA 



237 



B. Hind femora much shorter than the tegmina; ovipositor short and turned 



abruptly upward (Fig. 245). p. 237 Microcentrlm 



BB. Hind femora but Httle if any shorter than the tegmina; ovipositor well 



developed, and curved gradually upward, p. 237 Amblycorypha 



AA. Tegmina of nearly equal breadth throughout; the extreme point of the 

 vertex but little if any broader than the first segment of the antennce. p. 237. 



SCUDDERIA 



Microcentrum. — Two species of this genus are found in the United 

 States east of the Rocky Mountains; these are known as the angular- 

 winged katydids. Figure 245 repre- 

 sents the female of the larger angular- 

 winged katydid, Microccntnmi rhomhi- 

 folium, and the remarkable way in 

 which it deposits its eggs on leaves and 

 twigs. In this species the slightly hol- 

 lowed front of the pronotum has a ver\^ 

 small central tooth, which is lacking in Fig. 247.— Scudderia septentn- 

 smaller species. The smaller angular- ""«^'^- ^^rom Lugger.) 

 winged katydid, Microcentrum retinerve, is only slighth' smaller than 

 the larger one. 



Amblycorypha. — The three most common species of the genus 

 are the following : The oblong-winged katydid, Amblycorypha oblongi- 



folia (Fig. 246), is the largest of the 

 three most common species. The 

 tegmina measure from 34 to 37 mm. 

 in length; the ovipositor is less ser- 

 rate and less curved than in the next 

 species. The round-winged katydid, 

 Amblycorypha rotundifdlia, is a smaller 

 species ; the tegmina are not more than 

 30 mm. in length and are wide for their 

 length, as indicated by the specific 

 name; the ovipositor is quite broad, 

 much curved, and roughly serrated. 

 Uhler's kat^^did, Amblycorypha uhleri, 

 is our smallest species; the body meas- 

 ures from 14 to 16 mm. in length; the 

 tegmina from 24 to 26 mm.; and the 

 ovipositor about 8 mm. 



Scuddcria. — Species of this genus 

 are found throughout the United 

 States and in Canada ; but the greater 

 number of our species are found east 

 of the Great Plains. One species, 

 Scudderia mexicdna, is found in Cali- 

 'W^S i fornia and Oregon. A common eastern 



species which may serve as an ex- 

 am.ple of the insects of this genus, is 

 the northern bush-katydid, Scudderia 

 Fig. 2^%.~Pterophylla camelUfo- ^eptentriondUs^ Figure 247 represents 

 lia. (After Harris.) the male of this species, natural size. 



