1938] 
North American Caddis Flies 
9 
Hydroptila albicornis Hagen, 1861, p. 275. 
Lectotype, male. — St. Lawrence River, Canada, Osten 
Sacken. No. 11105. 
This species is easily identified by the sedeagus and clasp- 
ers, fig. 10. Hagen says the type is a female, but he was 
evidently misled by the retracted condition of the genitalia. 
Hydroptila maculata (Banks), 1904b, p. 116, 3 figs. 
( Allotrichia ) . 
Lectotype , male. — Falls Church, Virginia. No. 11595. 
The unique male genitalia, fig. 11, are approached only by 
waubesiana Betten, but many differences separate the two. 
Hydroptila tarsalis Hagen. — see Polytrichia tarsalis 
(Hagen) . 
Hydroptila transversa Banks, 1907b, p. 163. 
Lectotype, male. — Washington, D. C., September, at light. 
No. 11592. 
This is a synonym of maculatus (Banks) . 
Orthotrichia americana Banks, 1904b, p. 116, 1 fig. 
Lectotype, male. — Washington, D. C., August 13. No. 
11598. Lectoallotype, female. — Same data. 
Illustrations of the cleared male genitalia have been given 
by Morton, 1905, under the name brachiata, which falls as a 
synonym of americana Banks. The species americana of 
authors will take the name cristata Morton. 
Orthotrichia nigritta Banks, 1907b, p. 163, figs. 1-3. 
Lectotype, male. — Austen, Texas, March 3, 1901. No. 
11596. 
This striking, black species from the southwest is different 
in many respects from the usual definition of Orthotrichia 
and should be placed in a new genus. 
Metrichia new genus 
Characteristics. — Ocelli present, close to eye. Tibial spur 
count, 1-3-4; spur on front tibia apical and small. Wings, 
fig. 14, narrowing to a pointed apex. Front wings with Sc 
very stocky, and all the other veins well developed; Ml-2 
almost fused with Rs ; Cu & Cu2 running close to the hind 
margin of the wing. Hind wing with R1 apparently reduced 
