IG 



BULLETIN OF THE 



all of wliich exceptinf^ Charles Island I Lave 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 inclanoctra has not 

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

 by a distinct name. For rearlier comparison, and to bring out the correspon<l- 

 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. 5j aver. 41.6 mm.), and that from Chatham Island, H. I. discoidalis, the 

 smallest (length of tegmina, male 27-28.5, aver. 27.7.'i mm., female 30.5 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 tal)le. 



1. Sp.ice between eyes 



. Punctuation of fron- 

 tal costa above ocellus 



3. Mct.azona 



4. Lateral lobes of pro- 

 zona 



. Punctuation of meta- 

 zona 



6 Posterior branch of 

 (lifcnijal Tcin of teg- 

 mina 



7. Fuscous ."spots of teg- 

 mina 



8. Anal area of wing.s 



f). Apical fissure of hist 

 nliilominal segment of 

 male 



S. I. mscoinALis, 

 Chatham Island. 



S. L PrXCTATA, 



Hood Island 



very narrow, about two 

 thirds as wide as narrow- 

 est part of frontal costa. 



sparser 

 others. 



than in the 



S. I. IIYAI-INA, 



Tower Island. 



rather narrow, sc;irrply narrow, sliphtly narrow- 



ornot narrower than nar- er thnn tlie narrowest 



rowest part of frontal part of frontal co.-ta. 

 costa. 



closer than in S. I. dis- 

 coidalis. 



as in S. 1. 2>unctata. 



more nearly equal in ' relatively lonper than in midway between the 



length to the prozoua the other races, lieiiij,' other races, being one 



than in the other races, 1 one third to one fjuarter quarter to one fifth 



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

 one eighth longer. 



with a darker stripe in in the 9 (cf unknown) 

 the (f than in S. / hya- ' as in 9 of S. /. discoi- 

 lina, the stripe extend- i dalis, the stripe extend- 

 ing upon the head , in ing upon the head, 

 the 9 the stripe is less 

 conspicuous. 



midway in character be- 

 tween that of the other 



races . 



with four branches. 



deeper and larger than in 

 the other races. 



with five branches. 



numerous and rather 

 heavy, especially in the 

 inner discoidal area, 



in the (f (9 unknown) 

 with a lighter stripe than 

 in S. I. iliscoiditlis, the 

 stripe not extending 

 upon the head. 



feebler and finer than in 

 the other races. 



with five branches. 



as in S. I. diaroidnlis, less numerous and light- 



the reticulation of the cr than in the other 



uiiiui uiiMi. 1.1,11 uiu.., inner discoidal area races, in the inner dis- 



where they are deeper in denser than in the other coiil;il area but little 



color and congregated, j races. darker and h.ardly at all 



congregated. 



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

 cept close to the base, j 

 brown, breaking the hy- 

 aline surface into cells I 

 distinct throughout. | 



not deep, with a ccntr.il (unknown). 

 tul>ercle at bottom, I 

 breaking the basal curve. 



having all the veins and 

 cross-vein< of the inner 

 half pallid or hiteous, 

 making this portion of 

 the wing purely hyaline. 



deep and uniformly U- 

 shapeil, with no ba.s.al 

 interruption. 



