GBTLL1D.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 tibia 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 exierno-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 spiues along the hind tibiae. The fore wings have no tym- 

 panum. 



Para. In Mr. Saunders' collection. 



9. PLATYDACTYLUS CALIGINOSUS. 



Mas. Piceus, tomentosus; caput antice fulvum ; antenna gracillimce, 

 corpore plus duplo longiores ; prothorax fulvo biviltatus ; abdomen 

 nigrum, maculis subtus lateralibus segmentisque ventralibus fulvis ; 

 cerci fulvi, abdomine breviores ; alee anticce testaceo-cinerece, abdo- 

 minis apicem fere attingenies, vitta subcostali nigricante, tympano 

 bene determinato ; alee posticce valde longiores. 



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

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

 than twice the length of tbe 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 wings 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 

 affinities cannot be well ascertained. 



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



10. PLATYDACTYLUS? PLANUS. 



Fo3m. Testaceus, gracilis ; palporum articulus 3us subsecuriformis ; 

 prothorax subsulcatus, carinis lateralibus vix determinatis ; cerci 

 corpore breviores; omductus rectus, longus ; alee anticce abdomen 

 longe superantes ; alee postic< 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. Antennae 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 



