ART. 18. DESCRIPTIONS OF FOSSIL INSECTS COCKERELL. 15 



A. Schwarz, who remarked that it was with difficulty separable from 

 the modern C. externum. 



H olotype.— Co-t. No. 69218, U.S.N.M. 



Three species of Calosoma have been described from the Floris- 

 sant Miocene. The following key, based on the elytra, separates the 

 fossil species of Calosoma of America. 



Elytron 13 mm. long, without punctures emmonsii Souddei-. 



Elytron about 17 mm. long, greatest width less than 6.5 mm. 

 Interstices between striae divided into quadrate spaces by transverse lines (as 



in C. scrutator) calvini Wickhara. 



Interstices not so marked cockerelli Wickham. 



Elytron over 20 mm. long, 7 broad ; interstices between striae divided into quad- 

 rate spaces . fernquisti Cockerell. 



No less than eight species of Calosoma are known from the Upper 

 Miocene of Europe (Baden and Switzerland). One {C. heeri) was 

 described by Scudder, the rest by Heer. One supposed Calosoma 

 [C. agassizi) from the French Oligocene is now referred to the 

 related genus CaUiotheTie^. Handlirsch credits this species to Ousta- 

 let, 1874, but I believe it is the Carahiis agassizi Barthelemy-Laponi- 

 meraye, 1846. (In 1850 Le Conte named a Carahus from Lake 

 Superior after Agassiz, but he called it C. agassii. It is a form oi" 

 C. taedatKs Fabricius.) 



EXPLANATION OF PLATES. 

 Plate 1. 



Fig. 1. Dinopanorpha megarche X 3. 



2. Amagua fortis X 3. 



3. Clyttis(^) pervetnstus X 6. 



4. EpaUagites avus X 2. 



5. Hoplisus archoryctes X 3. 



G. Lahidnromma exsulatum X 3. 



7. MordeUa priscula X 6. 



8. Linyphia byrami X 6. 



Pr,ATE 2. 



Fig. 1. Cyttaroinyio reclusa X 3. 



2. SyrpJius eocenicus X 3. 



3. Delphax senilis X G. 



4. Acnemia cyclosoma X 4. 



5. Amasis byrami X 4. 



6. Plecia rhodopterina X G. 



7. Eophlebomyia claripennis X 6. 

 S. Calosoma -fernquisti X 2. 



