490 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 113 
and posteriorly (fig. 10,0). Second segment of maxillary palpus 
about twice as long as first. Left mandible with 2 apical teeth, 
right with 3 apical teeth, mesal one longest (like fig. 11,0). Thorax, 
pronotum yellow, muscle scars dark and conspicuous; fore femora 
much broadened. Abdomen, anal proleg with neither basoventral 
hook nor apicolateral spur; ventral teeth lacking on claw (like fig. 
116d). 
Material examined: Illinois, Hardin County, Karbers Ridge, 
May 1, 1936, 5 larvae (INHS). 
Remarks: Inasmuch as I have not collected the species, I can 
only state that Ross (1944, p. 37) found the species primarily in 
the area of Ozarkian Uplift in Southern Illinois, where it was abundant 
in the clear rapid streams that flow in the winter and spring. The 
adults were recorded from April 21 to June 6, and the larvae from 
March 23 to May 26. 
Rhyacophila kiamichi Ross 
FicureE 11,a,b 
Rhyacophila kiamichi Ross, 1944, p. 37 (male). 
This species is apparently restricted to the Ozarkian area of Okla- 
homa and Arkansas. 
The association of larva and adult is based on several male pupae 
collected in Arkansas. The larvae are typical of members of the 
carolina group and are rather difficult to separate from those of 
species 5 except by range, although the head capsule seems darker 
posteriorly. 
Description: Length, 14 mm. Head, brownish yellow, slightly 
darker posteriorly (fig. 11,a); second segment of maxillary palpus 
about twice as long as first; left mandible with 2 apical teeth, right 
with 3 apical teeth, mesal one longest (fig. 11,5). Thorax, pronotum 
yellow, immaculate; fore femora much broadened. Abdomen, 
anal proleg with neither basoventral hook nor apicolateral spur; 
no ventral teeth on claw (like fig. 11,d). 
Material examined: Arkansas, near Paris, Mount Magazine, 
May 16, 1958, 3 prepupae, 8 o2 pupae; Mount Magazine, Drip- 
ping Springs, May 16, 1958, 1 prepupa, 7 o'9 pupae; Mena, May 15, 
1958, 1 larva, 3 prepupae, 6 o&'? pupae; Dover, May 17, 1958, 5 
pupae. ; 
Remarks: All the collections were made in small brooks ranging 
in width from a foot to several yards. Most of the streams were 
comparatively warm and slightly turbid. 
The type series of adults was collected in early May. In Arkansas 
many were on the wing in late May; as many more were ready to 
