PIIASMID.E. DINELYTRON. 



163 



The male is very slender, with longer wings, legs, and 

 antennse than those of the female. The tegmina in the 

 latter are elongate-ovate, with the median carina rather 

 strongly elevated into a rounded tubercle near the middle ; 

 the costal area of the wings is much clouded, the markings 

 near the extremity being darker than those in the basal 

 half. The following are the dimensions of both sexes :— 



Long. corp. maris, unc. 3-| ; cap. lin. I5 ; anten. unc. 3 ; 

 proth. lin. If; mesoth. lin. 5 ; metath. lin. 5 ; abdom.liu. 



19 -+- lin. 4 = lin. 23 ; tegm. lin. 5 ; alar, expans. unc. 3^. 

 Long. corp. fccm. unc. 3-J ; cap. lin. 2 ; anten. — ?; 



proth. lin. 2 ; mesoth. lin. 6 ; metath. lin. 6$ ; abdom. lin. 



20 + lin. 3=lin. 23 ; tegm. lin. 6; alar, expans. unc. 4. 



Genus 35. DINELYTRON, G. R. Gray. 

 Platycrania, pars, Burmeister, Be Haan. 



Head moderate-sized. Ocelli obsolete. Antennae scarcely 

 longer than half the body. Body long. Thorax rather 

 short. Mesothorax scarcely twice the length of the pro- 

 thorax. Abdomen of the male filiform ; of the female con- 

 vex above, flat beneath ; anal styles short. Tegmina linear- 

 ovate, one-third or half the length of the wings ; the latter 

 large, semicircular in both sexes. Legs rather short, espe- 

 cially the anterior pair, with the margins of the fore femora 

 compressed. 



Inhabit South America. 



The insects of this group are certainly very closely allied 

 to those of Metriotes, with which they were united by Bur- 

 meister and De Haan. They are distinguished, however, 

 by a very different facies and by the much greater length 

 of the tegmina. 



1. (429.) Dinelytron Grylloides. 



Pallide brunneum vel viridi-cinereum ; tegminibus area- 

 que costali brunneo-griseis, obscuro-maculatis, hac basi pal- 

 lidiori ; alarum area postica hyalino-albida, apice obscura. 



Long. corp. 1" 9'" ; alar, expans. 2" 5'". 



Hab. In Brasilia. Olim in Coll. Soc. Zool. Lond. 



Dinelytron grylloides, G. R. Gray, Syn. Phasm. pp. 27, 43. 

 Burmeister, Handb. d. Ent. ii.2. 582 (Platycrania gr.). 

 Be Haan, Orth. Orient, p. 124 (Platycrania gr.). 



I have not been able to find the original typical speci- 

 men of this species, described by Mr. G. R. Gray, from 

 the Museum of the Zoological Society, the entomological 

 portion of which has been sold. A slight sketch of it was, 

 however, made by its describcr, who has kindly communi- 

 cated it to me ; and I have carefully examined a specimen, 



determined by Burmeister, in the Royal Museum of Berlin, 

 of which the following are the proportions : — 



Long. corp. lin. 25 ; cap. lin. If ; anten. lin. 13 ; proth. 

 lin. 2; mesoth. lin. 3 ; metath. lin. 4 ; abdom. lin. 12 + 

 lin. 2£=lin. 14| ; tegm. lin. 9 ; alar, expans. lin. 32. 



The fore legs are not quite an inch long ; the femora 

 have their inner margin dilated, the tibiae very slightly di- 

 lated towards the base ; the hind femora are slightly thick- 

 ened, with the under edge armed with several small spines ; 

 the three terminal segments of the abdomen are very nar- 

 row, the eighth especially being very short. 



2. (430.) Dinelytron Hipponax. 

 Cinereum ; prothorace spinis duabus ; tegminibus basi 



areaque costali alarum albis, viridi et brunneo rcticulatis ; 

 alis albidis, maculis interrupts nigrescentibus. 

 Long. corp. ? 



Dinelytron Hipponax, G. R. Gray, Syn. Phasm. p. 27. 

 De Haan, Orth. Orient, p. 123 (Platycrania H.). 

 Hab. In Brasilia. Mus. Westwood ? ? 



I am unable to give any additional information of this 

 species, originally described from my collection, the typical 

 specimen having been lost. 



3. (431.) Dinelytron Shuckardi. 

 "Brunneum ; alis obscure hyalinis, nervis brunneis." 

 Long. • 1 



Dinelytron Shuckardi, G. R. Gray, Syn. Phasm. p. 43. 

 Be Haan, Orth. Orient, p. 124 (Platycrania Sh.). 

 Ilab. In Brasilia. Olim in Mus. Soc. Zool. Lond. 



I have never seen this species, and can add nothing to 

 the description given by Mr. G. R. Gray, copied above. 



4. (432.) Dinelytron Zymbraeus, Westw. 

 Plate XV. fig. 3, female. 

 Elongatum, inerme ; mesothorace abbreviato ; luteo-vi- 

 ride ; tegminibus virescentibus, ultra dimidium alarum ex- 

 tensis ; alis albis, margine lato apicali nigro ; abdomine 

 fusco ; pedibus brevibus, femoribus anticis ad basin parum 

 emarginatis, posticis cum tibiis subserratis (mas et fcem.). 

 Long. corp. maris, lin. \2\\ cap. lin. 1 ; anten. lin. 10; 

 proth. lin. 1 ; mesoth. lin. 1^ ; metath. lin. 2£; abdom. 

 lin. 5^ + lin. 1^- = lin. 7; tegm. lin. 4-J-j alar, expans. 

 lin. 18. 



Long. corp. fcem. unc. 2 ; cap. lin. 2 ; anten. lin. 16 ; 



y2 



