AMERICAN NEUROPTERA. ZOO 



IVElJItOPTEROID IXSKtTS— Xoles and De^icriptioiis. 



BY NATIIAX BANKS. 



(Plates XVII-XIX.) 



To the following descriptions of new species I have added notes 

 on some other fornis, especially in the families Perlidse and Limne- 

 philidie, groups which I hope soon to revise. I have also figured 

 the genitalia of most of our species of the Goniotaidlus section of 

 LimnephiluH. The genus Dipledrona has not hitherto been re- 

 corded from our country. 



PERLID.E. 



Perla coiicolor n. sp. — Head bright yellowisli ; a black spot each side 

 staitiuf; in front of each posterior ocellus, and extending forward and outward 

 in front of each lateral scar; antennae pale yellowisli-biown, black on the basal 

 joint; pronotum pale brown, a narrow yellowish median stripe; thoi'ax yellow- 

 ish-brown, darkest near tip; sternum, venter and legs pale yellowish, tips of 

 femora and bases and tips of tibise dark. Wings pale brownish; venation yel- 

 lowish-brown, rather paler on costal space. Head not much broader than the 

 pronotum ; posterior ocelli closer to each other than to the anterior ocellus, and 

 still farther from the eyes; pronotum one and one-half times broader than long, 

 narrowed a little behind, sides straight, and angles quite sharp; the wings 

 rather narrow, the radial sector forked three times beyond the anastomosis, the 

 first just beyond, about seven cross-veins in median and in cubital series. The 

 last ventral segment of the male shows below a median area, more than twice as 

 long as bi'oad. Expanse 38 mm. 



From San Jose, California. 



I'ei'la niode»«ta n. sp. — Head yellow, broadly black each side behind 

 eyes, a transverse black band across anterior ocellus and toward antennte, some- 

 times with projections ujiward to the posterior ocelli ; palpi i)ale, antennae brown, 

 basal joint black; pronotum black, with a broad median yellow stripe, broadest 

 behind, thorax brown, a yellow spot on middle of front; abdomen rather paler 

 brown ; setae brownish, paler at base; legs yellowish-brown, femora darkest and 

 tarsi pale. Ocellar triangle, broader than long, hind ocelli as close to eyes as to 

 each other; pronotum one and one-half times broader than long, barely broader 

 in front than behind, anterior angles acute, hind angles less so; abdomen quite 

 long; setae short, basal joints very short, apical ones very slender. Wings gray 

 hyaline, venation mostly brown, costal basal part yellowish ; radial sector usually 

 forked three times beyond anastomosis, sometimes one of the branches is supe- 

 rior, five or six cross-veins in median series; seven or eight in cubital series; the 

 branches of anal vein approximate at base. Expanse 28 mm. 



Several from Boulder, Colo. (August), Rolnver. 



TRANS. AM. KNT. SOC. XXXIV. (32*) .SEPTE.MBER, 1908. 



