NO. l6.j ORTHOPTERA OF CONNECTICUT. 8l 



of the end of the femora to 2 mm. beyond in the female, and in 

 the male from 3 mm. short of the end to 3 mm. beyond. The teg- 

 mina taper slightly towards the apex. The color of this species 

 is even more variable than in pelidna, having not only the same 

 color forms as the latter, but many intermediate shades. Morse 

 gives the more striking variations as follows: 



Head Pronotum Tegmina 



1 Green Green Green 



2 Green Green Rose-red 



3 Brown Brown Rose-red 



4 Brown Brown Brown. 



Measurements. 



Body Antennae Tegmina Hind Femora 



Female 16-21.5 5 -6-5 9-16 9.5-12 



Male 13-14 4-5-6-5 10-13.3 8.5-10 



This species, which is one of the most abundant species of 

 Tryxalina, is found throughout New England, while the other 

 two species occur principally in the southern part. Speciosa 

 is found on rather light soil of pastures and cultivated fields. 

 We have taken specimens in various parts of the state from 

 19 July to 3 October. 



O. olivacea Morse. Figs. TO/: and 2oc. 



Allied to pelidna. Aside from the differences in the key 

 the vertex is more nearly horizontal and meets the front at a 

 sharper angle. The face is more oblique and the antennae shorter. 

 The pronotum is longer and the prozona wider, with the lateral 

 carinae less incurved and forming straight lines rather than 

 curves. It differs from speciosa in having the lateral carinae 

 strongly divergent on the metazona, making the disk much wider 

 at the posterior margin than the anterior. The tegmina sur- 

 pass the hind femora by at least 2 mm., tapering somewhat 

 towards the apex. The color is more uniform than in the other 

 two species, being in general pale brown to dark olive brown, or 

 light green above and pale brown below. Darker markings more 

 or less similar to those of other species. The colors have a 

 peculiar olivaceous tinge which corresponds to the tints of the 

 vegetation where it is found. Olivacea is somewhat the largest 

 of the three species. 

 6 



