218 Dr. K. Jordan on some 



EXPLANATION OF PLATE IX. 



Reference letters. 



cc^. = ectoderm. tries. =^niesog\cea.. 



end. = endoderm . nem.=- nematocyst. 



end. wjt<s. = endodermaI muscle. sph. ?«. = sphincter muscle. 



gld. c. = gland-cell. rec. wi. = retractor muscle. 



Fig. 1. Longitudinal section of the portion of the column of Alicia costal, 

 Pane, between the tentacles and the commencement of the 

 vesicles, showing the diffuse endodermal sphincter muscle, con- 

 siderably folded. Magnitied 33 times. 



Fiff. 2. Section through one of the large vesicles. Slightly raaguitied. 



Fig. 3. Transverse section through a flattened portion of an extended 

 tentacle, showing the arrangement of the nematocysts in limited 

 areas. Magnified 33 times. 



Fig. 4. Transverse section of a middle portion of a mesentery in the 

 region of the oesophagus. Magnified 33 times. 



XXV. — On some new Species of Cohoptera in the -Museum of 

 the Hon. Waller Rothschild. By Dr. K. JORDAN, 



1 . Trichius ornatus, sp. n. 



cJ 2 • ^>'' obscure viridis, infra seneo-nitens. Caput ssepe parum 

 purpurascens ; clyj^eo latitudine parum longiore, proecipue iu 2 ? 

 grosse punctate ; fronte et vertice in c? minute sat sparsim, in 

 2 dense subreticulato-punctatis, duabus raaculis frontis, duabus- 

 que lateralibus elongatis verticis luteis. Antennae pallida rufis, 

 articulo primo apice viridescente, clava maris ea femiute parum 

 longiore. Palpi rufi. 



Prothoras longitudiue parum latior, apice rectus, basi rotundatus, 

 lateribus pone angulos anticos promineutes, in J minus quam iu 

 2 rotundatos, leviter sinuatus, retrorsum gradatim ( cJ ) vel rofcun- 

 datim ( $ ) parum ampliatus, angulis posticis rotundatis ; sulco 

 mediano longitudiuali, sulcis transversis uno apicali, altero basali, 

 limbo lateral! medio angustiore, utririque macula disci obliqua 

 postraediana, altera minore subaj^icali, tertia lateral! mediana cum 

 limbo ac saepe cum macula prima connexa, luteis, his maculis 

 impressis ; disperse, ( c? ) minute, ( $ ) crasse punctatus. 



Scutellum triangulare, lougitudine latius, marginibus exclusis 

 luteum. 



Elytra latitudine sexta parte longiora, leviter striato-punctata, 

 interspatiis tertio caeteris multo latiore et primo parum elevatis ; 

 vitta mediana longitudinal! longitudine ac latitudine variante, iu 

 humeris seepe dilatata, rufa ; linea longitudinali interspatium 

 secundum occupante, guttis septem in utroque elytro luteis — 

 1" basali mediana, 2" basali marginal!, 3" dorsal! anteraediana in 



