LOCUSTHXE. 361 



the antennae; front flat, upright. Eyes very prominent. Palpi slender; 

 fifth joint of the maxillary linear, about twice the length of the fourth ; third 

 joint of the labial elongate-fusiform. Antennae long, slender. Prothorax 

 selliform, slightly contracted and transversely furrowed in the middle; fore 

 border slightly excavated in the middle and slightly convex on each side; 

 fore border hardly rounded ; lateral keels indeterminate ; sides with a 

 conical outline. Sternum deeply excavated and forming two acute lobes 

 in each segment. Abdomen slightly keeled above. Oviduct deep, much 

 curved, furrowed on each side, about one-third of the length of the abdomen. 

 Legs slender ; four anterior femora unarmed ; hind femora and four anterior 

 tibia3 with two rows of minute spines beneath, the former incrassated towards 

 the base; hind tibia? with four rows of minute spines. Fore wings narrow, 

 very much longer than the body, very little longer than the hind wings, 

 rounded at the tips; marginal vein emitting six veiulets to the costa, which 

 is rounded for much more than half the length from the base ; scapular vein 

 emitting nine oblique veinlets to the costa, of these the three first are forked 

 and the four last are very short; some large areolets between the veinlets 

 which are obliquely retracted from each side of the irregular longitudinal 

 vein which proceeds from the interno-medial vein ; some smaller areolets 

 formed by a few oblique veinlets between the externo-medial vein and the 

 irregular longitudinal vein which proceeds from it. Hind wings ample. 



The structure of the fore wings sufficiently distinguish this genus from 

 Phaneroptera. 



I. SlCTUNA ST RIG ATA. 



Foein. Leete viridis ; caput Jlavescente trivittatum ; labrum albido 

 marginatum ; prothorax vitta, fascia maculisque qualuor pallide 

 flavescentibus ; sternum albido marginatum ; abdomen gultis laterali- 

 bus flavescentibus, viltis duabus albidis venlralibus ; alee antica striyis 

 obliquis pallide flavescentibus ; alae posticce diaphana, striga apicali 

 viridi. 



Female. Vivid-green. Head with a pale yellowish stripe on the 

 vertex and with two stripes of the same hue on the front; labrum with a 

 whitish border. Prothorax with a stripe, an irregular band and four spots 

 pale yellowish. Lobes of the sternum with whitish borders. Abdomen 

 with yellowish dots along each side and with two whitish stripes beneath. 

 Fore wings with pale yellowish oblique subcostal streaks ; hinder veins 

 bordered with pale yellowish. Hind wings pellucid, green along the tip of 

 the costa. Length of the body 8 lines ; expansion of the fore wings 

 28 lines. 



a. Venezuela. From Mr. Dyson's collection. 



Genus 97. VI A DAN A. 



Fcem. Corpus sat gracile. Caput prothoraci aequilatum, inter oculos 

 subspinosum ; ftons plana, erecta. Oculi vakle promiuuli. Palpi graciles, 

 setulosi; articulus 3us 4o valde longior; 5us subclavatus, 3o valde longior. 

 Prothorax disco piano, carinis lateralibus bene determinatis, lateribus valde 

 rotuudatis, margiue postico subrotundato. Sternum incisum. Cerci 

 breves, lanceolati. Oviductus valde arcuatus, abdominis dimidio a3qui- 



T 



