ORTHOPTERA 503 



among the immature specimens is much more marked, but I believe 

 they all belong to the same species. Five specimens from Culpepper 

 and one from Abingdon are testaceous mottled with fuscous. Two 

 specimens from Tower and one from Hood have the general body 

 color, which is black, considerabl}- varied with testaceous on the pro- 

 notum and abdomen. Eight other specimens from Hood and two 

 from Albemarle are entirely black, except for the hind femora which 

 are always either plainly or obscurely transversely barred with fuscous 

 on a testaceous ground, and sometimes, also, a pair of minute reddish 

 spots on the disk of the pronotum and very obscure testaceous or red- 

 dish spots on the abdomen and pronotum. Scudder was unable to 

 distinguish the tympanum on the inner side of the anterior tibiae. It 

 is present in all these specimens though minute. 



The examination of 42 specimens of Grylli of all ages from seven 

 of the islands compels the conclusion that the second species of this 

 genus, which Scudder thought to be indicated by three immature 

 specimens from Charles, probably does not exist; at the same time 

 the absence of all specimens of this genus from Charles leaves the 

 matter in doubt. 



Measurements. — Length of body, $ 14 to 23 mm., 5 18 to 22; 

 tegmina, $ 7.5 to 14, 9 10 to 14.5; hind femora, $ 10 to 14, $ 14; 

 ovipositor, 18 to 19. 



Of its song, Mr. Snodgrass says it " consists of a continuous chirp- 

 ing sound differing from the intermittent sound made by the small 

 tree crickets ( Cycloptiluiri) found in swamps." 



Albemarle, 3 males, 2 nymphs ; Hood, 3 males, 8 females, 9 

 nymphs; Chatham, 2 males, 2 females, i nymph; Tower, 2 nymphs; 

 Abingdon, i nymph ; I^arboro, i male ; Culpepper, i male, 6 

 nymphs ; uncertain, i female. 



NEMOBIUS SPECULI sp. nov. 



Description. — Dark brown more or less varied with testaceous. 

 Sometimes the lighter color predominates but usually the darker, ex- 

 cept in the legs which are always obscure testaceous banded more or 

 less regularly with brown. The face, occiput and disk of the pronotum 

 are obscure testaceous maculate with brown ; on the posterior part of 

 the disk the markings are minute round spots; the lateral lobes of the 

 pronotum are brown with about seven round light spots, five above 

 and two below ; the veins of the tegmina are for the most part testa- 



Proc. Wash. Acad. Sci., November, 1901. 



