114 MICHIGAN ACADEMY OF SCIENCE. 



in a gall found on 'a species of oak which I call Q. tinctorial The galls 

 are found on the smaller branches, three or four being aggregated, are 

 globular, yellowish-brown, shining and hard. The species is dedicated 

 to the discoverer who will doubtless work out its larval history." 



From the above it will be seen that Mr. Clemens mistook the Coccid 

 for a gall, a very natural mistake for a man not well acquainted with 

 Hemiptera. His description applies perfectly to the Coccid. 



Through the kindness of Dr. Howard of the Department of Agriculture 

 at Washington, I am able to call attention to two more references to this 

 interesting insect. Prof. Comstock (Rep. of U. S. Entomologist for 1879, 

 p. 245) calls attention in 1879 to his having .collected and bred the 

 insect at Cedar Keys, Fla. He says: "This species was first described 

 by Clemens under the name of Hamadryas bassettella, from specimens 

 received from Mr. Bassett in Conn. The latter gentleman stated that he 

 had bred it from a gall on oak, but subsequently Mr. Riley pointed out 

 1o him that his supposed gall was in reality a Coccid. The rearing of the 

 same moth from what is evidently, if not the same, a closely allied species 

 of Coccid from two such widely separated localities as Connecticut and 

 Florida is a strong indication of the permanence of the carnivorous 

 habit iu this species." 



Tn 1881 Mr. Riley refers very briefly to the insect as infesting the scales 

 or bodies of Kermes galliformis. 



Dr. Howard informs me that he collected this species in 1882 or 188.S 

 in Kermes on an oak scrub in Ithaca, "N. Y. 



The fact that it has been found in four states as widely separated as 

 Connecticut, New York, Florida, and Minnesota, is a pretty safe indica- 

 tion that the habit is firmly established. 



THE HIND BRAIN AND CRANIAL NERVES OF ACIPENSER. 



BY J. B. JOHNSTON. 

 (From Anatomischer Anzeiger,— XIV. Band, Nr. 22 und 32, 1S9S.) 



Summary. 



A. Facts. 



1. The sensory Vth, VHIth, and lateral line nerves enter common 

 centers, namely, the Nucleus funiculi, tuberculum acusticum, and the 

 granular layer of rhe cerebellum. 



2. A large part of the Vth, VIHth, and lateral line fibres go as arcuate 

 fibres to the opposite side. 



3. The Lobus trigemini of Goronowitsch is shown by its structure 

 to be a part of the tuberculum acusticum. 



4. There is continuity of structure between the acusticum and the 

 granular layer of the cerebellum. In fact, the acusticum with the cere- 

 bellar crest corresponds in every detail with the cerebellum, and the one 

 may be considered as the direct continuation of the other. 



5. A large bundle of fibres (chiefly from the lateral line nerve?) runs 

 from the tuberculum acusticum to the Nucleus funiculi and to a special 

 Nucleus acustici spinalis. 



