ORTHOPTERA 5OI 



with the posterior margin very slightly sinuate and distinctly less 

 oblique than the anterior margin. Tegmina ovate, subacuminate, 

 touching only at the base, with the median and radial veins distinct 

 and the dorsal angularly separated from the lateral field. Hind 

 femora armed below on the distal half with seven spines, the first two 

 minute ; hind tibiae armed above with three spinules on the outer and 

 nine on the inner carinae. Ovipositor only slightly curved on the 

 upper, more decidedly on the lower margin; subgenital plate trian- 

 gular acute. 



Measurements. — Length of body (estimated), 37 mm. ; pronotum, 

 6.5; tegmina, 10; hindfemora, 17.5; length of ovipositor, 14; width 

 of ovipositor, 2.5. 



Barrington, i female. 



Subfamily CONOCEPHALIN^. 

 CONOCEPHALUS INSULANUS Scudd. 



It is rather remarkable that this species is known only from Chat- 

 ham. Mr. Snodgrass reports that it was common in a wet pasture 

 about 1,000 feet above sea level. It was not found elsewhere. Three 

 of the males and one female nymph are brown. In this variety the 

 tegmina are maculate pretty evenly with obscure fuscous. Besides the 

 fuscous stripe which borders the stridulating organ in both varieties, 

 the brown specimens have the upper half of the lateral lobes of the 

 pronotum infuscated, and this color is continued as a stripe on the teg- 

 mina bordering the radial vein. The lower half of the lateral lobes is 

 also infuscated more or less, and this region is separated from the 

 upper part by a moderately distinct stripe of the lighter ground color. 



Chatham, 5 males, 3 females, 4 nymphs. 



XIPHIDIUM EXITIOSUM sp. nov. 



Description. — Color, green with the usual dorsal stripe on the head 

 and pronotum. Pronotum widens posteriorly and continues to the hind 

 margin ; it is darkest medianly and on the edges. The vertex is only 

 slightly pinched at the eyes and is scarcely wider than the basal joint 

 of the antennas. The posterior border of the lateral lobes of the pro- 

 notum is scarcely perceptibly sinuate. The posterior femora are nearly 

 as long as the body, unarmed beneath. The ovipositor is at least three- 

 fourths the length of the hind femora and is very slightly curved. 



