230 OETHOPTEEA. 



Tribus MYRMECOPHILIN^E. 

 Myrmecophiliens, Saussure, Miss. Scient. Mex., Orthopt. p. 422 ; Mel. Orthopt. 5 e fasc. p. 455. 

 Myrmecophilida, Mogisoplistidee, Brunner v. Wattenwyl, Prodr. d. Eur. Orthopt. pp. 415, 447. 



[MYRMECOPHILUS, Latr. 



Myrmecophila, Latreille, Fam. Nat. Regne Anim. p. 413 (1825), et auctores. 



l. Myrmecophilus americanus, Sauss. 



Myrmecophilus americanus, Sauss. Mel. Orthopt. 5 e fasc. p. 461. 4 ( ? ). 

 Hab. Colombia. — Likely to be found in Panama.] 



ECTATODERUS, Guer. 



Ectatoderus, Guerin-Meneville, ap. Lefevre, Voyage en Abyssinie, 1840, vi. p. 337; Saussure, Mel. 



Orthopt. 5 e fasc. p. 470. 

 Ornebius, Guerin-Meneville, Icon, du Regne Anim., Ins. p. 331 (1840). 



l. Ectatoderus aztecus, sp. n. (Tab. XI. figg. 35, 36.) 



3 . Crassiusculus, fuscus. Caput suborbiculare, levissime convexum, vitta transversa obsoleta faciei vittaque 

 irregulari utrinque supra oculos, fulvis. Antenna? fuscse, basi pallidiores. Oculi late elliptici, vel sub- 

 ovoidei, superne haud attenuati, margine interno supra subtilissime inciso. Palporum articulus ultimus 

 latiusculus, ovatus. Pronotum seque longum ac latum, deplanatum, antice haud fortiter coaretatum ; 

 margine anteriore sinuato, posteriore transverso, vix arcuato ; superficie supra castanea, utrinque ad 

 margines late flavo-fulva, lobis lateralibus nigris. Discus in dorso utrinque punctis crassis nigris 

 2 notatus, ac inter illos utrinque pagum intercalatum piriformem, elevato-marginatum, extus acutum 

 obferens. Elytra in dorso parallela, apicem abdominis liberantia, sordide testacea et lineis fuscis umbrata, 

 margine postico arcuato ; ante marginem vitta regulari fusca. Speculum valde latius quam longum, 

 elevato-strigatum, angulo antico recto vel obtuso ; ramis analibus 3. Campus lateralis latissimus, luteus, 

 vittis 2-3 longitudinalibus fuscis, secunda latissima ; margine infero ante medium angulato. Pedes com- 

 pressi ; anteriores et intermedia fusci, coxis, genubus articulationeque tarsorum testaceis ; metatarsis 

 longiusculis. Femora postica crassa, fusco-testacea, apice fusca. Tibia? post, latiusculse, fusco-rufescentes, 

 apice fusciores, supra late canaliculatse, marginibus valde denticulatis. Calcar interno-intermedium sat 

 elongatum ; superum minutum. Tarsi fusci ; metatarsus posterior elongatus, supra multidenticulatus. 

 Abdomen fusco-nigrum, subtus fusco-testaceum. Cerci longiusculi, rufi, basi incrassati. Ultimum 

 segmentum dorsale angustum, testaceum. Lamina supra-analis elongato-trigonalis, apice rotundata. 

 Lamina infra-genitalis transversa, margine subarcuato, nigro. 



cT . Long. corp. 6-8 ; pronot. 2-2, latit. 3 ; elytr. ultra pronot. 2-7, latit. 3 - 2 ; fern. post. 4*8 millim. 



Figures. — Fig. 35. Tbe male insect. — Fig. 36. The pronotum, to show the four black spots and the two scutella 

 intercalated between them. 



Bab. Mexico, Chilpancingo in Guerrero 4600 feet (E. H. Smith). 



This species is very easy to distinguish from all the other known Ectatoderi by the 

 pronotum not being strongly produced posteriorly, and but slightly attenuated ante- 

 riorly, the markings of its upper surface also differing from those of the allied forms. 

 The shortness of the pronotum leaves the speculum of the elytra quite free, and even 

 the diagonal vein, which starts from its anterior angle, is partly visible. 



