76 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



one-third broader than long, trapezoidal, narrower behind, sides broadly rounded, sinuate posteriorly, angles acute 

 and prominent, a longitudinal median line and two basal impressions, anteriorly feebly emarginate ; base slightly 

 produced and emarginate at middle. Elytra oval, moderately convex, with striae evanescent at the sides and apex, 

 base broadly rounded ; humeri distinct, obtuse, surface clothed with rather dense suberect pubescence ; third stria 

 with three setiferous punctures. Beneath finely and more sparsely pubescent. Length, .23 inch. 



Easily known by its pubescence, form of thorax, and very acute hind angles. The form of thorax is very nearly 

 that of Trechus rubens. The pubescence covering the surface of the body is exceedingly fine in this and the preced- 

 ing species, requiring a good lens for its detection. Collected in Cave City Cave by Mr. Charles Sonne. 



We append the description of the last species of this genus discovered., I am indebted to Dr. 

 George Marx for the excellent figure of this species. 



Anophthalmia interstitialis Hubbard. PI. XX, fig. 5. 



Pale rufo-testaceus, shining. Head elongate-oval, deeply arcnately bi-impressed, nearly as wide as prothorax. 

 Antennae slender. Thorax longer than broad, narrowed behind, sides moderately rounded, sinuate posteriorly, hind 

 angles rectangular, base truncate, median line impressed throughout its entire length, basal impressions deep. Elytra 

 elongate-oval, feebly convex, moderately deeply striate, the striae obsoletely punctate and scarcely fainter at the 

 sides; sides sinuate immediately behind the humeri, which are obliquely rounded; base prolonged at middle; elytral 

 interspaces distinctly but sparsely punctured, more distinctly outwardly from the fourth, the punctures on alternate 

 interspaces almost uniseriate, and each bearing a short erect hair. Length, 5.4 mm = .21 inch. 



A single female from Washington's Hall, in the Mammoth Cave. 



The species is at once distinguished from all others in our fauna by the punctured outer interspaces of the elytra. 

 Though plainly pubescent (the lines of hairs on the elytra are easily seen with a lens of moderate power), it differs 

 from all other pubescent species by the thorax being longer than wide and the base of the elytra obliquely prolonged. 

 The elytra, moreover, can not be called subopaque, and are hardly less shining than in A. menetriesii. It is most 

 closely allied to A. tenuis, which it resembles especially in its very elongate form, but differs by the very distinctly 

 striate elytra. The elytra are less truncate at base than in A. menetriesii, and the punctures of the striae are much 

 finer and less distinct. The antennae are long and slender, as in A. tellkampfii, and the form of the body is even more 

 slender. The penultimate joint of maxillary palpi is shorter than the last joint. 



A specimen of A. menetriesii from Mammoth Cave in my possession is plainly but very sparsely pubescent, there 

 being a single row of fine hairs on each elytral interspace. Twelve other specimens of the same species all show 

 traces of pubescence. The smallest individual among these measures but 4.8 mm (=.19 inch) in length; is somewhat 

 lighter in color, more elongate in form, and with the hind angles of prothorax less acute. (Amer. Ent., iii, 1880.) 



THE LARVA AND PUPA OF ANOPHTHALMIA AND ADELOPS. 

 (Plate XX, figs. 6, 6a, 6d, 7, 9, 9a.) 



It was a matter of much importance to discover the larvae or young of the blind beetles, the 

 true autochthones of these caverns, in order to ascertain whether the young are born blind, partic- 

 ularly as the larvae of these genera, so far as we know, had not yet been discovered in Europe. 

 Systematic research in different caves soon revealed several larvae, both of Anophthalmus and of 

 Adelops. The young Anophthalmus occurred in several caves, particularly in Salt Cave, on damp 

 sand-banks, under stones. Fig. 6 represents what is without much doubt the larva of A. tell- 

 kampfii. This larva is more closely allied to that of the European Pterostichus nigrita, figured by 

 Schiodte, than any other form with which I have been able to compare it, but the body is rather 

 slenderer, the head much longer and narrower, and the mouth parts longer, while the caudal 

 appendages are shorter. The end of the body is like those of Harpalus and Stenolophus, as figured 

 by Schiodte, but the mandibles resemble those of Harpalus. There are no traces of eyes, and the 

 body is white and rather soft, not chitinous, as in most Carabid larvae. There is no sculpturing on 

 the head, and but a single claw on the legs. 



At the same time and in the same sand-banks occurred the pupa (Fig. 7, enlarged) of the same 

 species. It rested in little pits or cells three-quarters of an inch long, under flat stones, and 

 was eyeless and white, with the harder parts of the mouth honey-yellow in color. Whether this 

 belongs to A. tellkampfii or to A. menetriesii remains, of course, yet to be proved. 



That the specimens I found and described were really Carabidae and the larva of Anophthalmus 

 has been called in question both by Dr. Horn and Dr. Hagen, without, however, any reasons for 

 their opinion. It seems to me, after again comparing the larvae and figures we have shown, with 

 the characters of the Carabid larvae figured and described by Schiodte in Kroyer's Tidskrift, that 

 they can not be referred to the Staphylinidae or any group than Carabidae. Unfortunately, the 

 larva of Trechus, so far as we know, is unknown, and no Anophthalmus has yet been raised from 



