GRYLLID.E. 83 



16. Platydactylus helvolus. 



Platydactylus helvolvus, Sere. Orth. 366 — Gryllus dorsalis, Burnt. Handb. 

 Ent. ii. 733 — Grvllus (Phalangopsis) helvolus, Ilaan, Verh. Nat. 

 Gesc/i. Ned. Ind. Bez. Ins. 235. 



Java. Borneo. Japan. 



17. Platydactylus indecorus. 



FcBm. Fulvus, tomentosus ; caput subcarinalum, nigro bivittatum et uni- 

 maculatum ; prothorax nigro bivittatus, lateribus subrectis ; cerci 

 oviductu paullo breviores ; oviduct us rectus ; pedes pubescentes, 

 fusco conspersi, tibiis posticis utrinque selosis subserralis et quadri- 

 spinosis; aim anticce inordinatim reticulata, abdomen huge super- 

 antes, punctis quatuor subcoslalibus albidis ; aim posticus valde 

 longiores. 



Female. Tawny, tomentose, slender. Head with two black stripes on 

 the vertex ; these stripes join a large black spot in front, wbere there is a 

 prominent ridge between the eyes ; sides testaceous. Eyes small, not pro- 

 minent. Palpi testaceous; third joint obliquely truncated. Prothorax 

 transverse, a little narrower in front, with two black stripes; in a line with 

 the stripes on the head ; space testaceous between the stripes and the sides, 

 which are nearly straight. Dorsum of the abdomen mostly piceous. Cerci 

 a little shorter than the oviduct, which is straight and as long as the abdo- 

 men and has a black tip. Legs stout, pubescent, speckled with brown ; 

 hind tibiae setose, very minutely serrated and with four spines on each side; 

 spines on one side alternate with those on the other. Fore wings irregularly 

 reticulated, extending much beyond the abdomen, with four whitish points 

 along the scapular vein ; space between the keels and the costa pellucid, 

 with seven very oblique branches of the mediastinal vein (of which the 

 seventh is forked) and with regular transverse sectors. Hind wings 

 extending much beyond the fore wings. Length of the body 7 lines. 



The hind tibia? are shorter than in most species of this genus and it 

 approaches P. continuus, which differs still more from the typical form. 



Siara. In Mr. Saunders' collection. 



Ceylon. 



18. Platydactylus prjecipuus. 



Fcem. Teslaceus, tomentosus ; caput antice subcarinutum ; palporunt 

 arliculus 3ms oblique truncatus; prothorax carinis indelerminatis, 

 lateribus subreflexis ; cerci corpore vix breviores ; oviduclus abdomine 

 multo longior ,- tibice poslicm utrinque serratm et quadrispinosm, spinis 

 interioribus arcualis ; alee an tic a abdomen paullo superantes ; aim 

 posticm valde longiores. 



Female. Testaceous, tomentose. Head as broad as the prothorax, 

 prominent between the sockets of the antenna?. Eyes prominent, slightly 

 and transversely elongated, narrowest in frout. Third joint of the palpi 

 clavate, obliquely truncated, longer than the second. Antenna? piceous 

 testaceous towards the base, very much longer than the body ; first joint 



