August, 1944 



Ross: Caddis Flies of Illinois 



27 



81-90. Includes a size range of 5 to 



40 mm 2 



2. Ocelli present, fig. 21 3 



Ocelli absent 8 



3. Maxillary palpi 3-segmented, fig. 65. . 



cf Limnephilidae, p. 176 



Maxillary palpi 4- or 5-segmented. ... 4 



4. Maxillary palpi 4-segmented, fig. 64. . 



cf Phryganeidae, p. 161 



Maxillary palpi 5-segmented, fig. 63. . 5 



5. Maxillary palpi with fifth segment two 



or three times as long as fourth, fig. 



61 Philopotamidae, p. 44 



Maxillary palpi with fifth segment not 



Fig. 59. — Triaenodes tarda cf, head; Ip, 

 labial palpus; mp, maxillary palpus. 



Fig. 60. — Psilotreta sp. cf , maxillary palpus. 



Fig. 61. — Dolophilus shawnee cf, maxillary 

 palpus. 



Fig. 62. — Rhyacophila lobijera d^ , maxillary 

 palpus. 



Fig. 63. — Banksioia selina 9, maxillary 

 palpus. 



Fig. 64. — Banksioia selina cf, maxillary 

 palpus. 



Fig. 68. — Phryganea cinerea, labrum. 



Fig. 69. — -Beraea gorteba, middle leg. 



Fig. 70. — Beraea gorteba, middle tarsi. 



Fig. 71. — Sericostoma crassicornis, middle 

 tarsi. 



Fig. 72, — Sericostoma crassicornis, middle 

 tibia. 1 



Fig. 73. — Molanna uniophila, middle leg. 



Fig. 74. — Brachycentrus nttmerosus, middle 

 tibia and tarsi. 



Fig. 75. — -Theliopsyche corona, middle tibia 



Fig. 65. — Limnephilus submonilifer cf , head; and tarsi. 

 Ip, labial palpus; mp, maxillary palpus. Fig. 76. — Helicopsyche borealis, hind wing. 



Fig. 66. — Lepidostoma liba c?", head; Ip, Fig. 77. — Sericostoma crassicornis, front 



labial palpus; mp, maxillary palpus. wing. 



Fig. 67. — Rhyacophila lobijera, labrum. Fig. 78. — Sericostoma crassicornis, head. 



Fig. 79. — Brachycentrus numerosus, head. 



