448 SNODGRASS 



and James Islands. It occurs, however, also on Wenman, Charles 

 and Albemarle. Each of the last two islands adds a new species to 

 the genus, and it is probable that a search at the proper season on the 

 other islands would show that the genus is not limited to the five is- 

 lands from which it is now known. 



H. robustus was found abundant early in June on that part of Inde- 

 fatigable adjoining the Seymour Islands. Only one specimen of H. 

 choristopterus was obtained on Charles. On Albemarle, one speci- 

 men of H. cuspidatus was obtained in December at Iguana Cove, a 

 very humid district. The other specimens were taken in June near 

 the top of the high mountain inland from Tagus Cove. The species 

 was found here only above 3,500 feet, but below the summit — 4,000 

 feet. This region is wetter than the lower parts of the mountain, but 

 it is arid compared with the Iguana Cove region, and much dryer than 

 the summit of the mountain. Hence, the distribution of the species is 

 somewhat curious. The Wenman specimen is interesting in being 

 the only Orthopteran secured on the island. It was taken from the 

 stomach of a mocking bird. 



DETAILED DESCRIPTIONS. 



HALMENUS ROBUSTUS Scudder. 

 Pezotettix V\c. sp. Bruner, Proc. U. S. Nat. Mus., xii, p. 193, 1889. 

 Halmenus robushis Scudder, Bull. Mus. Comp. Zool., xxv, No. i, vii, p. 18, 

 pi. I, figs. 6 and 7, 1893. 



From Indefatigable and James Islands. 



Descriptio7i of Eight Specimens. — Head and dorsum of pronotum 

 brownish-yellow, the frontal costa in four specimens dotted above 

 with fuscous along the lateral angles ; in one the whole front, vertex 

 and gente are coarsely spotted with black, and there is much continuous 

 dusky about the bases of the antennae ; a black longitudinal post- 

 ocular stripe. Antennae generally irregularly annulate with dusky on 

 a yellow ground, the dark color sometimes occupying a whole segment 

 and sometimes only a part of a segment, generally more prominent on 

 the distal half where its tends to become continuous ; two specimens 

 have no dusky on the basal part of the antennae ; antennae hence not 

 concolorous as described by Scudder. Eyes dark brown. Upper part 

 of the side of the prozona with a wide longitudinal black band, 

 generally with a yellow longitudinal dash in it on the scutum ; 

 the prozona below this stripe either plain brownish-yellow or with 

 black spots and mottlings. The specimen having the entire head 

 spotted with black has also the entire dorsal surface of the pro- 

 notum mottled with the same color, and the sides below the lateral 

 stripe spotted as is the head. The black band of the prozona in four 



