EEIOLtTS. 383 



c. Gracilis. Elytris elongatis. Verticis rostrum acutum. Lobi geniculares postici 

 minute lobati. — 1. mexicanus, Sss. 

 cc. Minus gracilis, pedibus minus gracilibus. Verticis rostrum hebetatum. Lobi 

 geniculares postici spiniformes. — 2. consobrinus, sp. n. 

 aa. Ovipositor angustior, acutus. 



b. Elytra modice angusta, apice rotundata. Ovipositor valde falcatus, — 3. falcatus, sp. n. 

 bb. Elytra angustissima, acuta. Ovipositor parum arcuatus, breviusculus.— 4. acutipennis, 

 sp. n. 

 2. Mares. 



a. Pronotum margine postico producto, rotundato. — 5. longipennis, Redt. ( ? <?). 

 aa. Pronotum postice truncatum. 



b. Elytra apice rotundata. Verticis rostrum conicum. 



c. Lobi geniculares postici lobiformes. Verticis rostrum vix prominulum, subobtusum. 

 Elytra breviora. — 6. brevipennis, Redt. 

 cc. Lobi geniculares postici spiniformes. Verticis rostrum prominulum. — 2. consobrinus. 

 bb. Elytra acuta. Verticis rostrum apice rotundatum. — 4. acutipennis. 



1. Eriolus mexicanus, Sauss. (Tab. XIX. figg. 4, 5.) 



Copiophora mexicana, Sauss. Rev. et Mag. Zool. (2) xi. p. 207 (1859) ; Redt. Monogr. der Conoceph. 

 p. 28, nota. 



$ • Viridis, gracilis. Caput laevigatum ; facies laevigata, superne leviter rugulosa ; mandibular apice margine 

 interno et externo brevissime nigris. Verticis rostrum conicum, primum articulum antennarum superans, 

 acutum, subtus carinatum. Pronotum rugulosum, postice parum productum, margine postico subarcuato 

 fere sicut in E. spinigero, R., sed paulo minus arcuato. Lobi laterales angulo infero haud producto. 

 Elytra angusta, abdomen valde superantia, apiceni versus angustata ; campo marginali areolis principalibus 

 magnis, irregularibus impleto. Alae hyaline, elytra haud superantes. Pedes graciles. Femora antica 

 subtus margine interno spinis 4, externo mutico ; lobo geniculari interno spiniformi, externo breviore 

 truncate. Femora postica margine exteriore spinis 6 + 5, margine interno apice spinulis 2-3 ; lobis 

 genicularibus obtusis haud productis. Tibiae posticae graciles, femoribus paulo longiores. Ovipositor 

 compressus, a latere basi supra sinuatus, ante medium latissimus, dehinc gradatim attenuatus, apice 

 oblique truncatus, fusco-limbatus, subacutus ; margine infero valde arcuato ; margine supero vix sinuato ; 

 marginibus omnibus integris, haud granosis, excepto in margine apicali truncate granulis 3-4 ; lateribus 

 subtilissime rugulosis, linea elevato-granulosa nulla vel obsoleta. Lamina infra-genitalis in medio 

 emarginata. 



5 . Long. 24, cum elytr. 40 ; elytr. 31 ; femor. post. 14 ; ovipos. 10*5 millim. 



Fiotkes : — Fig. 4, the female insect, magnified. — Fig. 4*, ditto, natural size. — Fig. 5, head and pronotum, 

 from above. 



Eab. Mexico, Cordova (Saussure). 



Our unique specimen is now in very bad condition, so that we are unable to give a 

 complete description to supplement the original diagnosis. It may be noticed that the 

 legs are longer and more slender in this species than in any of the other known members 

 of the genus ; the process of the vertex is also more acute than usual. Fortunately, we 

 possess a good figure which was made long ago from the type. 



