GRYLLID.E. 79 



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

 tbe disk, tlie 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 exteruo-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 hiud tibiae. The fore wings have no tym- 

 panum. 

 Para. In Mr. Saunders' collection. 



9. Platydactylus caliginosus. 

 Mas. Piceus, (omeniosus ; caput antice fulviim ; antenna: gracillimm, 



corpore plus duplo longiores ; prolhorax fulvo bivillatus ; abdomen 



nigrum, maculis subtus laleralibus segmentisque ventralibm fulvis ; 



cerci fulvi, abdomine brevinres ; aim anticce lestaceo-cinerece, abdo-. 



minis apicem fere attingenles, villa subcostali nigricante, tympana 



bene determinate ; alee poslicm 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. Prolhorax 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 winirs testaceous-cinereous, 

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

 scapular vein; tympanum distinct; 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 

 afBnilies cannot be well ascertained. 

 a. British Guiana, Presented by Sir K. Schomburgk. 



10. Platydactylus? planus. 

 Foem. Testaceus, gracilis; palporum articulus 3ms subsecuriformis ; 

 prolhorax subsulcatus, carinis laleralibus vix determinalis ; cerci 

 corpore breviores ; oviductus rectus, longus ; alee anticce abdomen 

 longe superantes ; alee poslicie valde longiores. 

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

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

 of the palpi slightly securiform. Antennae longer than the body. Pro- 

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

 keels not prominent; sifles 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 



