6108 



Insects. 



obtusum, segnientis quatuor apertis, prioiibiis tribus fere aequali- 

 bus, postremo maximo obtuso ; pedes parum elongati, coxis 

 anterioribus magnis posteiioribns paulo dilatatis ; tibiis posteri- 

 oribus calcaratis, tarsisque brevioribus, gracillimis. 



Forma obloiiga et obtasa, proiioto subquadrato, atqiie coxis 

 minus dilatatis a Trichopterice hoc genus differt ab aliis autem 

 coxis evidenter dilatatis elytrisque truncatis. 



Titan, Newman. 



Antennae articulis undecim, basali maxirao cylindrico, secundo 

 magno orbiculato, sex sequentibus brevibus rotundatis, fere 

 aequalibus, tribus ultimis majoribus rotundatis, apicali acumi- 

 iiato ; caput magnum, fronte rotundata; pronotum transversum, 

 posterius parum dilatatum, capite vix longius, lateribus rotun- 

 daiis, angulis fere rectis; scutellum magnum triangulare ; elytra 

 abbreviata, quadrata, abriipte truncata, posterius parum dilatata, 

 ad humeros pionoto parum angustiora; pedes breviores, coxis 

 omnibus magnis, posterioribus baud laminatis, tibiis anteriori- 

 bus dilatatis, intus calcaratis posterioribus quatuor robustis, 

 tarsis mediocribus, articulis basalibus parum dilatatis. 



Hoc genus coxis baud laminatis Trichoptericibus propriis 

 differt, a sequentibus elytra brevissima ad distinguendum 

 valent. 



SYNONYMIC LIST. 



Fam. TrichopterygiDvE, Haltday^ Dab, Nat, Hist. Rev, [Proc. of 

 Soc, pp. 121 — 123; Fanne Francaise, 



Trichopterygia, Gillmeister, Deuts, Ins, von J, Sturm, xvii. Tri- 

 chopterygia, Erichson^ Nat. der Ins, Dents, iii. 13, Ptilina, Heer, 

 Faun, Col. Helvet. 



Gen. 1. Ptinella. 



Trichopteryx, p., Gillm. Ptilium, p., Erichson, I. c. iii. 31 — 33; 

 Guerin ; Faune Francaise^ i. 338 ; De JeaUy Catal. 3rd ed. 138. 

 Omalium, fValtl, in litt. test, Gillm, 



1. Britannica, Matthews^ Zool. 6032. 



Gen. 2. Pteryx. 



1. Mutabilis, Matthews. 



