LOCUSTIDJE. 427 



lobis l.ateralibus longis truncatis ; cerci lanceolati, subarcuati ; styli 

 lineares ; pedes robusti, breviusculi, spinosuli ; alee anticce latiusculae, 

 femoribus posticis plus duplo lonyiores^ costa subrotundala, margine 

 interiors fere recto; alts postica diaphance,apiee reticulata, paullo 

 longiores. 



Male. Testaceous, very slender. Head elongate, a little narrower 

 than the fore border of the prothorax ; keel lanceolate, acute, slightly 

 furrowed, a little narrower than the first joint of the antennae ; front flat, 

 very oblique, hardly extending between the eyes. Eyes tawny, prominent, 

 nearly round. Prothorax very thinly tuberculate, with a tuberculate keel 

 and with two transverse impressed lines ; fore border and hind border very 

 slightly angular ; lateral lobes elongated, truncated. Supra-anal lamina 

 furrowed. Cerci lanceolate, slightly curved. Subgenital lamina with two 

 slender linear stales. Legs stout, rather short, with very minute spines; 

 hind femora five-twelfths of the length of the fore wings ; hind tibias with 

 spines on two of the fore keels. Fore wings rather broad, very minutely 

 reticulated, shorter by one line than the hind wings; costa slightly 

 rounded ; interior border nearly straight ; transverse veins between the 

 scapular and the costa ramose towards the base, simple towards the tip ; 

 scapular and externo-medial diverging very slightly from each other beyond 

 the middle ; areolets large, regular; interno-medial vein and branch of the 

 externo-medial parallel to each other, not forked. Hind wings pellucid, 

 minutely reticulated at the tips; veins whitish. Length of the body 

 9 lines ; expansion of the fore wings 25 lines. 



Nearly allied to A. earinatum, but the prothorax is much less 

 keeled. 



a. Ceylon. From the Rev. Mr. Wenham's collection. 



10. APRION POERECTUM. 



Mas. Pallide flavescente viride, gracile ; capitis carina lanceolata, sul- 

 cata ; antennce validce, prothorax subluberculatus, margine antico 

 rotundato, lateribus subrotundatis, margine postico vaf.de rotundato ; 

 cerci cylindrici, graciles ; pedes robusti, spinosi ; alee aquilongce ; 

 alee anticce la tee, femoribus posticis plus duplo longiores, costa basin 

 versus subrotundata ; alee posticce diaphance. 



Male. Pale yellowish green, slender. Head a little narrower than the 

 fore border of the prothorax ; fore part shining, very oblique; keel of the 

 vertex lanceolate, furrowed, much shorter than the first joint of the antenna 

 and not more than half its breadth ; front conical between the sockets of 

 the antennae. Fifth joint of the palpi clavate. Eyes brown, round, very 

 prominent. Antenna} stout. Prothorax slightly tuberculale, with an 

 indistinct longitudinal and two strongly marked transverse impressed lines ; 

 fore border rounded ; sides slightly rounded; hind border much rounded. 

 Supra-anal lamina elongate. Cerci cylindrical, slender. Subgenital 

 lamina long, slender, with two long styles. Legs stout; femora with two 

 rows of spines, those on the outer side much larger than those on the inner 

 side ; hind femora less than half the length of the fore wings ; four anterior 

 tibiae with two rows of small spines ; hind tibias quadrilateral, with spines 

 on three keels, those on the lower keel very small. Wings of equal length. 



