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MR. R. M'LACHLAN ON NEW FORMS, ETC., 



A genus of small insects, of which I possess three species 

 from North and South America. Distinguished from all de- 

 scribed genera of Hydropsychidse (excepting possibly some in- 

 sects at present grouped in Macronema) by the anterior tibiae being 

 only unicalcarate ; with somewhat the facies of small species of 

 Hydropsy die , but shorter and broader in form, the anterior 

 wings being less elongate. 



Smicridea fasciatella, n. sp. S. fusca. Caput chiereo fuscoque 

 pilosum. Antennae fuscescentes, albido semiannulatae. Pedes flave- 

 scentes ; tibiis, praecipue posterioribus, fusco-hirsutis. Abdomen fus- 

 cum : maris appendices inferiores bis articulatae, articulo ultimo deor- 

 sum curvato. Alae anticse fuscae, niveo bifasciatae, basin versus niveo 

 nebulosae : posticae fusco-fuliginosae ( <3 $ ). 

 Long. corp. 2 lin. (=4 mill.); exp. alar, of lin. (=12 mill.). 

 Hab. Texas {Belfrage) (in Mus. auct.). 



Fuscous. Head clothed with cinereous hairs, the two large posterior 

 tubercles emitting brownish-black hairs : eyes deep black : antennae 

 fuscescent, each joint above with a whitish spot, distinct only towards 

 the base of the thread : palpi obscure yellowish or fuscescent. Meso- 

 notum fuscous, with a tuft of brownish-black hairs on each shoulder. 

 Legs yellowish ; the intermediate and posterior tibiae, especially the 

 latter, clothed with blackish or brownish hairs, principally on the outer 

 side. Abdomen fuscous : in the S the app. sup. seem to form two long 

 straight blades closely applied one against the other ; app. inf. long, 

 two-jointed, directed upwards, clothed with fuscous hairs, the second 

 joint short and acute, curved strongly downward ; penis slender, cy- 

 lindrical, obtuse, semipellucid : in the § the extremity of the abdomen 

 is furnished with a short subtriangular lobe projecting from the last 

 dorsal segment and directed somewhat upward ; on each side, below 

 this, is a broadly obtuse lobe, little prominent. 



Anterior wings smoky fuscous, almost blackish, with short golden pu- 

 bescence ; near the base is a white clouding, little distinct, and scarcely 

 forming a broad fascia ; beyond the middle a narrow, white, straight 

 fascia, almost interrupted by the dark veins ; and before the apex a 

 similar fascia, which is slightly incurvated on the costal and inner 

 margins ; these markings are caused by white pubescence, and do not 

 affect the membrane ; the veins are dark ; the subcosta extending 

 slightly beyond the middle of the costa ; the median cellule com- 

 mencing before the discoidal, and extending to its middle. Posterior 

 wings smoky blackish, with concolorous fringes ; the costal margin 

 rather irregularly sinuate ; the subcosta joining the margin before 

 the middle. (PI. IV. fig. 19, details.) 



I possess five examples taken by Mr. Eelfrage in Texas in 

 July and October. 



