GRYLL1D/E. 79 



obliquely truncate. Prolhorax transverse, with a darker furcate mark in 

 the disk, the forks curved outward ; sides rounded. Disk of the abdomen 

 piceous. Cerci more than half the length of the abdomen. Four anterior 

 legs short; hind tibiae minutely serrated on each side, with four spines on 

 the outer side and with five on the inner side. Fore wings extending much 

 beyond the abdomen, irregularly reticulated, with a row of black dots along 

 the externo-medial vein. Hind wings extending much beyond the fore 

 wings. Length of the body 9 lines. 



This may be the male of P. columbicus ; it differs from the latter in 

 the number of spines along the hind tibiae. The fore wings have no tym- 

 panum. 

 Para. In Mr. Saunders' collection. 



9. Platvdactylus caliginosus. 



Mas. Piceus, lomentosus ; caput antice fulvum ; antenna gracillima, 

 corpore plus duplo longiores ; prolhorax fuivo bivillatus ; abdomen 

 nigrum, maculis subtus iateratibvs segmentisque ventralibus fulvis ; 

 cerci fulvi, abdomine breviores ; alee anticcp teslaceo-cinerece, abdo- 

 minis apicem fere atlingenies, villa subcostali nigricante, lympano 

 bene delerminalo ; alec postica valde longiores. 



Male. Piceous, tomentose. Head tawny in front. Eyes tawny, not 

 prominent. Third joint of the palpi clavate. Antennae very slender, more 

 than twice the length of the body. Prothorax transverse, with two tawny 

 stripes adjoining the inner sides of the lateral keels. Abdomen black, with 

 a large tawny spot on the hind border of each dorsal segment beneath ; 

 ventral segments tawny. Cerci tawny, shorter than the abdomen. Four 

 anterior legs moderately long and stout. Fore wimjs testaceous-cinereous, 

 extending nearly to the tip of the abdomen, with a blackish stripe along the 

 scapular vein; tympanum distiuct; space beyond slightly reticulated; 

 branches of the mediastinal vein numerous, nearly parallel. Hind wings 

 extending much beyond the fore wings. Length of the body 9 lines. 



The specimen described is deprived of the hind legs, and therefore its 

 affinities cannot be well ascertained. 

 a. British Guiana. Presented by Sir R. Schomburgk. 



10. PlatydactylusT planus. 



Fcem. Teslaceus, gracilis; palporum articulus 3us subsecuriformis ; 

 prolhorax subsulcatas, carinis lateralibus vix delerminatis ; cerci 

 corpore breviores; oviductus rectus, longus ; alee anticce abdomen 

 longe superanles ; alee poslicce valde longiores. 

 Female. Testaceous, slender, shining. Head almost as broad as the 

 prothorax. Eyes piceous, slightly elongated, not prominent. Third joint 

 of the palpi slightly securiform. Antenna? longer than the body. Pro- 

 thorax about as long as broad, with a slight longitudinal furrow ; lateral 

 keels not prominent; sides rounded. Cerci somewhat shorter than the 

 body. Oviduct straight, as long as the cerci; tip black. Legs rather 

 stout; four anterior legs short. Fore wings extending much beyond the 

 abdomen ; transverse sectors numerous, regular ; subcostal space with 



