LOCUSTID^. 433 



The family of Acanthodidse begin with the following genus. 



Genus 129. POLYANCISTRUS. 



Polyancistrus, Serv. Rev. 57 ; Hist. Orth. 534. Brulle, Hist. Nat. Ins. \X' 

 — Lobodes, Fisch. de W. Bull. Mosc. 1846, 479. 



1. Polyancistrus serrulatus. 



Locnsta senulata. Pal. Beauv. Ins. 218; Orth. pi. 7, f. 2 — Polyancistrus 

 serrulatus, Serv. Rev. 57; Hist. Orth. 535 — Lobodes rubricornis, Fisch. 

 de W. Bull. Mosc. 1846. 



a. St. Domingo. From Mr. Tweedie's collection. 



Genus 130. ZACATULA. 



Mas. Corpus sat gracile. Caput liEve, carinulis duabus antice ap- 

 proximatis; frons fere plana. Oculi rolundi, valde approximaii. Antennae 

 loufzissimEe, gracillimae. Protborax vugosus, planus ; carinas laterales ob- 

 tuse quadridentalae, bene determinalaB. Pectoris latera trispinosa; pro- 

 sternum, mesoslernum et nietasternum bispinosa. Lamiua supra-aualis 

 brevis, lata. Cerci lanceolati, arcuati. Lamina subgenilalis lata, subtus 

 carinaia, stylis duobus lanceolatis. Pedes robusti, lougiusculi, fortiter 

 spinosi. Alae anlicae sat angustae, apice rotundatEe, sublititer reticulatae, 

 areolis nounullis magnis, costa fere recta, margine interiore vix rotuudato. 

 Alae posiicae paullo breviores. 



Male. Body rather slender. Head smooth, as broad as the fore border 

 of the prothorax ; two keels in front of the vertex converging forward, where 

 they are parted by a transverse suture from the slightly rounded border of 

 the front between the eyes; front erect, nearly flat. Eyes round, extremely 

 prominent. Fourth joint of the maxillary palpi much shorter than the 

 third and about half the length of the fifth, which is subclavate. Labial 

 palpi with the usual structure. Antenna very slender, much more than 

 twice the length of the body. Prothorax rugose, flat, slightly widening 

 hindward ; two slight transverse impressed lines; lateral keels well defined, 

 with four rounded prominent teeth on each ; lore border and hind border 

 almost straight; lateral lobes slightly rounded, with an elevated rim. 

 Pectus with three spines on each side near the lateral lobe. Prosternum, 

 mesosternum and metasiernum with a spine on each side. Supra-anal 

 lamina broad, short. Cerci lanceolate, curved. Subgenital lamina broad, 

 keeled beneath, with two lanceolate styles. Legs stout, rather long ; spines 

 stout; four anterior femora with five or six spmes on the outer side; hind 

 femora with two rows of spines, more than two-thirds of the length of the 

 fore wings ; four anterior tibiae with a few minute spines; hind tibiae with 

 four rows of spines, of which those on the two lower keels are few and 

 minute. Fore wings rather narrow, minutely reticulated, rounded at the 

 tips, longer than ihe body, a little longer than the hind wings ; aieolets 

 few, large, quadrilateral ; scapular vein diverging slightly from the externo- 

 medial in the exterior part, the space between them reticulated and without 

 regular areolets; interno-medial vein hardly undulating; costa almost 

 straight ; interior border very slightly rounded. 



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