. Bulletin of the Lloyd Library of Botany, Pharmacy and Materia Medica. Botany; Pharmacy; Entomology; Fungi. RHYACOPHILIDjE. bordering the mouth parts, where it shades into brown. The mandibles are black and differ in form, as in figure 185. The labrum is small and is very weakly RHYACOPHILA FUSCULA. 184. Larva. Head and thorax. 187. Larva. Prolegs, ventral view. 185. Larva. Mandibles. 188. Larva. Frons. 186. Larva. Drag-hook. 189. Larva. Prolegs, lateral view. The Thorax.—The chitinous dorsum of the prothorax is straw yellow, marked with dark-brown, as in figure 184. Each epister
. Bulletin of the Lloyd Library of Botany, Pharmacy and Materia Medica. Botany; Pharmacy; Entomology; Fungi. RHYACOPHILIDjE. bordering the mouth parts, where it shades into brown. The mandibles are black and differ in form, as in figure 185. The labrum is small and is very weakly RHYACOPHILA FUSCULA. 184. Larva. Head and thorax. 187. Larva. Prolegs, ventral view. 185. Larva. Mandibles. 188. Larva. Frons. 186. Larva. Drag-hook. 189. Larva. Prolegs, lateral view. The Thorax.—The chitinous dorsum of the prothorax is straw yellow, marked with dark-brown, as in figure 184. Each epister- num is extenuated forward into an upturned spine-like projection which bears a seta at its tip. The ventral surface is free from chitinous plates and is without a horn. On the meso- and meta-thorax dorsal chitinous plates are lack- ing. The pleural sutures are deeply sunken, giving a bulbous form to the bordering integument above the bases of the coxae. The Abdomen.—The abdomen is somewhat flattened and the sutures are deeply constricted, giving a decidedly corrugated ap- pearance. External gills are entirely absent—spacing-humps and lateral fringe are lacking. The drag-hooks are well developed; each movable claw, figure 186, has three teeth and two prominent setae on its lower surface; above the claw just back of the hinge there is an obtuse chitinous projection, figure 189, and at the base of each proleg there is a long rapier-like projection, figure 189; 8 113. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lloyd Library and Museum; Lloyd Library of Botany, Pharmacy and Materia Medica. Cincinnati, The Lloyd Library and Museum
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