TWENTY-FIFTH ANNUAL MEETING. Ill 



termine the species, but I contidently expect to find them identical with species from 

 the Fort Pierre group, if not new. Furthermore, of the vertebrates that I know from 

 these beds, all seem different from those of the beds below. One of them I have re- 

 cently described as Clidastes westii, the most aberrant species in the genus. 



Lithologically, the outcrops, which are not extensive, are all of a deep blue color, 

 with numerous and large septaria, in which are found the large and beautiful crys- 

 tals of baryte. The outcrop occurs at the extreme top of the Niobrara, on the North 

 Fork of the Smoky Hill and in the vicinity of Fort Wallace. The first true Niobrara 

 yellow chalk was observed near the mouth of the North Fork, at an elevation nearly 

 100 feet below the McAllaster outcrops. • 



In this connection, it will be of interest to observe that Hay has found '"an out- 

 crop in Norton county of two well-marked strata above the yellow chalk," consist- 

 ing of green sand and green clay shale. (Sixth Bien. Rep. St. Bd. of Agric, p. 103.) 

 Whether or not they belong to an upper cretaceous horizon remains to be shown. 



NOTES ON THE ELEMENTARY COMPARATIVE EXTERNAL ANATOMY 



OF INSECTS. 



[For use in entomological laboratory of the University of Kansas.] 

 BY VEENON L. KELLOGG, tTNIVEESITT OF KANSAS, LAWBENCE. 



A laboratory course in entomology of 20 weeks, 10 hours' work a week, is offered 

 in the University as a junior or senior optional. Students electing this course 

 have had a 20 weeks' course, 10 weeks of lectures and 10 weeks of laboratory work 

 for 10 hours a week, in general zo51ogy. The object of the course in entomology is 

 to train the student in accurate work in anatomical detail, and to give him a knowl- 

 edge of insect anatomy upon which further work in the comparative anatomy of 

 insects or the determination of species may be based. 



A very excellent laboratory guide for this course is that begun by Prof. J. H. Com- 

 stock, of Cornell University, and by him called (A Fragment of a) Guide to Prac- 

 tical Work in Elementary Entomology. This guide covers, in careful detail, the 

 external anatomy of the common red-legged locust {Caloptemis femur-ruhruni De 

 Geer). As a continuation of similar work in external anatomy, I have prepared 

 some laboratory notes ( printed as a pamphlet of 12 octavo pages) entitled as at the 

 head of this paper, and comprising anatomical notes on the following subjects: The 

 head and thorax of the milkweed butterfly, Danais archippixs Fabr.; the mouth parts 

 of the honeybee, Apis ineUifica Linn.; and the pleural sclerites of the rummaging 

 ground beetle, Calosoma scrutator Fabr. The nomenclature of aspects and direc- 

 tions used is that adopted by Professor Comstock (after Professors Wilder and 

 Gage, Cornell) in his "Guide." 



In the "Notes" issue is taken with Burgess's statement (see his Contributions to 

 the Anatomy of the Milkweed Butterfly, Danais archippus Fabr.) that the clypens 

 of archippus "passes directly into the epicranium without any suture or line of de- 

 marcation." A suture extending between the antennary fossae separating clypens 

 from epicranium is plainly to be made out. The patagiae of the thorax of archippns 

 are found to be outgrowths of the meso-thoracic paraptera. The meta-thoracic 

 paraptera are also described. The peculiar shape of the epicranium, accommodat- 

 ing itself to the overlarge compound eyes, is described, and the occiput, gula and 

 labium are described, all of which are points untreated by Burgess. 



