LOCUSTIDiE. 247 



The spines on the hind femora distinguish the following section from 

 the typical species of the genus. 



Sect. n. 



Fcem. Corpus robustura, glabrura, nilens, aplerum. Caput prothorace 

 paullo anwusiius, veitice antico hilo porreclo rotuiuiato, fronte subobliqua. 

 Oculi parvi, nou globosi. Palporura arliculus 4 us 3o paullo longior; 5us 

 subclavatus, 4o multo longior. Proihorax postice productus, angustus, 

 roiunrlalus, metaihoracem obtegens, lateribus valde rotundatis, carinis 

 lateralibus iiideterminatis. Abdomen prothorace perparuni longius. 

 Oviductus perparura arcuatus abdoniini sequilongus. Pedes robusli, 

 femora quatuor anteriora subtus subsetosa ; femora postica suhtus spinn- 

 losa; tibiae quatuor anteriores triseriatim spinosae ; tibiae posticae quadri- 

 seriatim spinulosae. 



Male. Body stout, smooth. Head narrower than the proihorax, 

 conical and prominent between the antennae; front and face erect, the 

 latter rather lonj;. Eyes small, not prominent. Palpi long, setulose; 

 fourth joint of the m;ixillary as long as the third; fifth subclavate, much 

 longer than the fourth. AutennsB very slender, more than twice the length 

 of the body. Prothorax narrower hindward, where it is elongated and 

 much rounded ; sides much rounded; lateral keels distinct. Prosternum, 

 mesosternum and melasternum with a spine on each side. Abdomen 

 tapering trom the base to the tip, not longer than the prothorax. Legs 

 stout, rather long ; four anterior femora with four very minute spines on 

 each side beneath ; hind femora with two rows of several minute spines on 

 each side buneath ; four anterior tibiae with five rather long spines on each 

 side beneath and with two or three above; hind tibice with four rows of 

 numerous minute spines and with short apical spurs. Wings rudimentary. 

 Female. — Prothorax narrower hindward than that of the male. Oviduct 

 hardly curved upward, nearly as long as the body. Wings not apparent. 



6. Thyreonotus basalis. 



Mas. Fulvus, fusco aut nigra conspersus ; caput postice nigricante nola- 

 tum ; prothorax lilura discoidali scutifortni, lateribus late luteis ; 

 abdomen basi nigro bistrigatum. Var. /3. — Pallidior ; prothorax tes- 

 taceo marginatus, lateribus non luteis. Var. y. — Caput et prothorax 

 testacea, hie apicem versus viride, ilium postice fusco binotatum, 



Male. Tawny, speckled with brown or black. Head with some 

 blackish marks on each side near the hind border. Prothorax broadly 

 luteous on each side; a scutiform mark in the disk. Abdomen with a 

 short black streak on each side at the base. Legs speckled with brown or 

 with black. Var. (3. — Paler. Prothorax not luteous on each side ; border 

 testaceous. Var. y. — Head and prothorax testaceous. Head brown on 

 each side hindward. Prothorax grass-green towards the tip. 



Foem. Testaceus ; prothorax anlice et postice nigropunctatus^ apud 

 marginem posticum nigricante binotatus et fusco bilineolatus ; 

 oviductus basi viridi bisirigatus. 



