August, 1944 



Ross: Caddis Flies of Illinois 



201 



Aedeagus short, with a ventral, bifid, sclero- 

 tized scoop and a pair of short, dorsal scle- 

 rotized spurs. 



Female. — Similar to male in color and 

 general structure. Genitalia, fig. 692, with 

 small subgenital plate, the lateral lobes 

 relatively narrow, the mesal tongue long; 

 ninth and tenth segments fused to form a 

 wide, very short, compressed tube with 

 dorso-lateral expansions. 



Holotype, male. — Meramec Springs, St. 

 James, Missouri: Oct. 8, 1938, Ross & 

 Burks. 



Allotype, male. — Same data as for holo- 

 type. 



Paratypes. — Same data as for holotype, 

 257 c?, 44 9. 



Known only from a single large colony 

 at Meramec Springs, which are more in the 

 nature of an underground river. This col- 

 ony was located on September 29, 1938, by 

 Frison & Yeager, who collected larvae and 

 pupae and reported them literally paving 

 spring and stream. Ross & Burks visited 

 the spot a few days later and collected large 

 numbers of all stages. The adults were 

 found in floating beds of water cress; when 

 the water cress was pushed under water the 

 caddis fly adults came to the surface and 

 were collected in large numbers. 



The short wings of this species, fig. 63\A, 

 are very dissimilar to those of the genotype, 

 fig. 6315, and suggest immediately that a 

 new genus should be erected for this new 

 species. The male genitalia, however, are 

 so similar in the two forms that there is 

 no doubt that irrorata and missouri are 

 practically sister species. 



Grensia new genus 



Adults. — General structure typical for 

 family. Head and mesonotum without un- 

 usually large macrochaetae. Mesoscutum 

 with elongate oval warts. Tibial spur count 

 1-2-2. Front wings, fig. 63 IC, with stigma 

 very wide and short, R., curving with stig- 

 ma, gradually becoming closer to it, the two 

 nearly or distinctly touching at apex; cord 

 irregular, distinctly not in line with base of 

 stigma; R.^ curving markedly. Hind wings 

 typical for group. 



Genotype. — L'tmuepliilus praeteritus. 



The only known representative is the 

 genotype, recorded from Arctic portions of 

 North America. It has not been taken in 

 Illinois. 



Phanocelia Banks 



Phanocelia Banks (1943, p. 354). Genotype, 

 by original designation: Jpatanin canadensis 

 Banks. 



The genotype, described from Manitoba, 

 is the only known North American species in 

 this genus, and has never been taken in Illi- 



Fig. 694. — Phanocelia canadensis, male gen- 

 italia. A, lateral aspect; B, aedeagus; C, 

 dorsal aspect. 



nois. The female is not known, but the male 

 is readily distinguished by the genitalia, fig. 

 694. 



Psychoglypha new genus 



Adults. — General structure typical for 

 family. Male palpi long and slender. Last 

 tarsal segment of all legs without black 

 spines. Dorsal macrochaetae of head not 

 conspicuously longer or stouter than sur- 

 rounding setae ; area between and behind 

 lateral ocelli bare except for a group of five 

 or six silvery setae near each ocellus. Meso- 

 notum with a pair of well-defined and ovate 

 scutal warts; meso-scutellum with a pair 

 of rows of five or six well-separated setae. 

 Front wings as in fig. 633, with a distinct 

 stigma which is usually colored red, the red 



