250 OETHOPTEEA. 



l. Endacustes aztecus, sp. n. (Tab. XII. figg. 20-22.) 



Crassiusculus, superne fuscescens. Caput antice et in lateribus luteo-multipictum, superne fuscum. Cranium 

 postice breve, antice ad basin rostri depressum ; verticis rostro piano, quam primus articulus antennarum 

 angustiore. Scutelli facialis processus dimidiam altitudinem ejus sequans, superne attenuatum, primo 

 articulo antennarum aequilatus. Oculi prominuli, piriformes. Palpi (fig. 22) gracillimi, longissimi, supra 

 lutei. Antennae longissimae, fusco-rufae, aunulis minimis luteis 6-7, invicem longe remotis, omatse. 

 Pronotum fuscum, rufo-hirtum, ac f'usco-pilosum, supra leviter depressum, per sulcum latiusculum longi- 

 tudinalem divisuin et utrinque sulco transverso notatum; margine posteriore transverso, subsinuato. 

 Lobi laterales valde obliqui ; margine infero arcuato, retro valde ascendente, angulo antico minute 

 rotundato. Pronoti limbus posterior etsi in lobis lateralibus necnon limbus anterior loborum lateralium 

 flavo-lutei (vel si mavis : limbus totus pronoti flavidus, exceptis margine anteriore supra et angulo loborum 

 lateralium), margine immo toto anguste fusco ; lobi laterales insuper maculis 1 vel 2 flavidis. Pedes 

 longi, fusco-fasciati. Tibiae anticae in latere interno tympano minore rotundato- elliptico instructae. 

 Femora postica gracilia, in parte J- apicali linearia, extus vittis obliquis fuscis 3 lineaque longitudinali, 

 fuscis ; intus venuste fusco et fulvo marmorata, basin versus superne fusco-reticulata vel fulvo-maculosa. 

 Tibiae fuscae, valde spinulosae spinisque mobilibus 4 : 4 alternis, fulvis, apice curvatis, instructae ; ultima 

 spina interna minima. Calcar intern o-intermedium plusquam dimidium metatarsum longum ; superum 

 quam intermedium 3 vel plus brevius. Metatarsus margine supero-externo spinulis 9-10 armatus ; tertia 

 parte basali inermi ; subtus haud distincte carinatus. Abdomen fuscum, supra obsolete fulvo-irroratum, 

 fulvescenti-sericeum. Cerci brunnei, basi rufescentes. 



2 • Aptera. Lamina infra-genitalis trapezina, obtuse incisa. Ovipositor rectus, quam femur brevior, basi 

 incrassatus, apicem versus gradatim attenuates, valvulis apicalibus minutis, lanceolatis, simul sumptis 

 subtus subsinuatis, haud serrulatis. Cerci ovipositore longiores. 



S . Elytra supra breviter elliptica, abdominis apicem liberantia, latiuscula, rufescentia. Tympanum venis 

 obliquis 3. Speculum irregulariter trigonale, venulis irregularibus venulosum. Venae postanalis et post- 

 axillaris prima arcuatae ; ilia ramulum ad venam diagonalem, alteram transversum ad speculum emittens. 

 Pars interna elytrorum subreticulosa. Campus lateralis niger, margine costali vitta sulfurea, in margine 

 postico elytri anguste producta, ornato ; vena mediastina ramos obliquos irregulares emittente. Alae nullae. 

 Lamina supra-analis subquadrata, retro leviter coarctata, marginibus lateralibus pliculatis. Lamina 

 infra-genitalis compressa, a latere truncata (quando deplicata : subbilobata). 



5 . Long. corp. 14 ; pronot. 3 ; fem. post. 17*5 ; ovipos. 13 millim. 



cJ . Long. corp. 14; pronot. 3 ; elytr. 7 ; femor. post. 18 millim. 



Rah. Mexico, Teapa in Tabasco (H. H. Smith). x 



This insect is very different from the Australian members of the genus. It has still 

 longer legs than E. australis ; the anterior and intermediate femora are quite slender, 

 while in E. australis they are somewhat incrassated at the base. In E. australis the 

 shield-shaped area of the face is higher, and its process towards the vertex, is not so 

 much attenuated, and more widely truncated at the top ; the palpi are much shorter 

 and less slender ; and the elytra of the male are one-half shorter, with five or six oblique 

 veins, &c. 



In E. irroratus the legs and palpi are much shorter and thicker ; the hind femora 

 are scarcely linear at the apex ; the process of the vertex is shorter and triangularly 

 truncate ; the two superior inner spurs of the posterior tibiae are of equal length, or 

 the superior is the longest ; the ovipositor is not attenuated at the tip ; the elytra of 

 the male are much smaller, covering only half of the abdomen, and have 7-8 obligue 

 veins, and the tympanum is regularly triangular. 



