16 



BULLETIN OF THE 



all of which excepting Charles Island I have examined specimens, though 

 only females from Hood and males from Tower. The result of my examina- 

 tion of these is to convince me that each of these three islands (from two of 

 which, curiously enough, Hood and Tower, Schistocerca melanoccra has not 

 been reported) supports a distinct race, which for convenience I have designated 

 by a distinct name. For readier comparison, and to bring out the correspond- 

 ences as well as distinctions, the characters are given in a tabular form. The 

 race from Hood Island, S. I. 'punctata, is the largest of the three (length of tegmina 

 39.5-45.5, aver. 41.6 mm.), and that from Chatham Island, S. I. discoidalis, the 

 smallest (length of tegmina, male 27-28.5, aver. 27.75 mm., female 36.5 mm.), 

 S. I. hyalina from Tower Island being apparently intermediate (length of 

 tegmina, male 31-31.5, aver. 31.25 mm.). The points of distinction between 

 the several races are shown in the following taljle. 



1. Space between eyes 



2. Punctuation of fron- 

 tal costa above ocellus 



3. Metazona 



4 Lateral lobes of pro- 

 zona 



5. Punctuation of meta- 

 zoua 



G Po-sterior branch of 

 Ui.«coidal vein of teg- 

 mina 



7. Fuscous spots of teg- 

 mina 



8. Anal area of wings 



0. Apical fissure of last 

 abdominal segment of 

 male 



S. I. DISCOIDALIS, 



Chatham Island. 



Tery narrow, about two 

 thirds as wide as narrow- 

 est part of frontal costa. 



spar.^er than in the 

 others. 



S. l Pl'NCTATA, 



Hood I.sland 



rather narrow, Fcarrely 

 or not narrower than nar- 

 rowest part of frontal 

 costa. 



closer than in S. I. dis- 

 coii/alh. 



f>. I. IIYAL1N.\, 



Tower I.sland. 



narrow, slightly narrow- 

 er than tlic narrowest 

 part of frontal co.-ta. 



as in .S'. I. pnnctafa. 



more nearly equal in ' relatively longer than in ' niidw.ay bi-twoen the 

 length to the iirnzona the other races, being other races, being one 

 than in the other races, one thinl to one quarter . quarter to one fifth 

 being but one seventh to longer than the prozona. longer than the prozoua. 

 one eighth longer 



in the 9 (d unknown) 

 as in 9 of .S. /. discoi- 

 </alis, the stripe extend- 

 ing upon the head. 



with a darker stripe in 

 the ,^ than in 5. / lu/n- 

 1)71(1, the stripe extend 

 ing upon the head . in 

 the § the stripe is less 

 conspicuous. 



midway in char.acter be- ! deeper and larger than in 



twcen that of the other the other races, 



races 



with four branches. 



witli five branches. 



numerous and rather as in S. !. disrnidnlis, 

 heavy, especially in the the reticulation of the 

 inner discoidal area, ' inner discoidal area 

 where they are deeper in | denser th.in in the other 

 color and congregated. races. 



having all the veins, ex- as in .S'. /. discoidalis, 

 cept close to the base, 

 brown, breaking the hy- 

 aline surface into cells 

 distinct throughout. 



not deep, with a central (unknown), 

 tubercle at bottom, 

 breaking the basal curve. 



in the (f (9 unknown) 

 with a lighter strijie than 

 in S. I. (liscoii/iilis, the 

 stripe not extending 

 upon the head. 



feebler and finer than in 

 the other races. 



with five branches. 



less numerous and light- 

 er than in the other 

 races, in the inner di.s- . 

 coiilal area but little 

 darker and hardly at all 

 congregated. 



having all the veins and 

 cross-veins of the inner 

 half pallid or luteous, 

 making this portion of 

 tlie wing purely hyaline. 



deep and uniformly U- 

 shaped, with no basal 

 interruption. 



