NO. l6.] ORTHOPTERA OF CONNECTICUT. 79 



Three species are found in Connecticut. These are difficult 

 to determine, as individuals of the same species vary greatly in 

 color, markings, and even structure. 



Key to Species. 



Vertex of head about right-angled or a little acute in the 

 male, slightly narrowed between the eyes. The central 

 depression back one-fourth to one-third the width 

 of the vertex. Lateral carinas of pronotum strongly 

 incurved and the distance between them at hind mar- 

 gin much greater than at front margin. Median 

 carina cut at middle. Tegmina usually surpass- 

 ing hind femora (Figs. 19a and 20a) pelidna 



Vertex of head blunt, rounded, obtuse in the female, 

 right-angled in the male, scarcely narrowed between 

 the eyes. The central depression close to apex. 

 Lateral carinae of pronotum little incurved, the dis- 

 tance between them but little greater at hind margin 

 than at the front. Median carina cut back of the 

 middle. Tegmina about reaching end of hind femora, 

 often shorter, rarely surpassing it (Figs. 19b and 

 20b) speciosa 



Vertex of head acute, the sides often incurved in the 

 males, distinctly narrowed between the eyes. Central 

 depression back from the apex about one-half the 

 width of the vertex. Lateral carinse of pronotum little 

 incurved, the distance between them much greater 

 at hind margin than at the front. Median carina 

 cut back of the middle. Tegmina usually extending 

 beyond the hind femora (Figs. 19c and 20c) . . . .olivacea 



Fig. 21. Orphulella pelidna, female. Lateral view of head. 



O. pelidna Burmeister. Figs. 19a and 20a. 

 Head with the vertex raised above the disk. Median carina 

 absent. Foveolae distinct, narrowly triangular. Frontal costa 



