18 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol.61. 



face; pronotum longer and more deeply cleft than in C . hrevis. Sides 

 broadly rounded posteriorly, hind margin slightly emarginate. 

 Measurements. 



Length of entire soldier : 5-6 mm. 



Length of head with mandibles : 2.15-2.40 mm. 



Length of head without mandibles : 1.20-1.40 mm. 



Length of left mandible: 0.95-1.0 mm. 



Height of head : 1.20 mm. 



I^ength of pronotum (at corners) : 0.80-0.90 mm. 



Length of hind tibia : 0.807 mm. 



Width of head : 1.35-1.40 mm. 



Width of pronotum : 1.35-1.40 ram. 



The series of soldiers upon which this description is based were 

 found at Ancon, Canal Zone, Panama, J. Zetek and I. Molino, col- 

 lectors, " 6/21/21," from dry oak baseboard of revolving bookcase. 

 Ace. No. Z. 1498 ; it was not found with the type of the winged adult, 

 but with metatypes — dealated, sexual adults. 



Frit'z Miiller ^^ writes : 



Calotermes smcathmani und C. hagenii unterscheideu sich von anderen 

 bekannten arten dadurch, dass bei den Soldaten der aufgebogene Yoi-derrand 

 des Prothoras geziihnelt ist. Auch die Kopfbildung der Soldaten ist eine sehr 

 eigeuthiimliche. Bei den Soldaten von C. smcathmani finden sich Fliigel- 

 scheiden an Mittel- und Hinterbrust, die bei denen des C. hagenii, wie bei denen 

 unserer anderon Calotermes — Arten fehlen. 



Holmgren (1910) founded his new subgenus Eucryptotennes on 

 the single species hageni of Fritz Miiller; it is a South American 

 invalid species, apparently closely related to Cryptotermes thomp- 

 sonae Snyder. 



Silvestri^^ states: 



f] probabile che una delle due specie date da Fritz Jliiller (.Ten. Zeit. VIII, 

 p. 341, nota 3) con il nome di Calotermes smeathmani e C. Jiagenii sia uguale 

 al mio C. taurocephalus e I'altra al C. triceromcgas, pero le descrizioni che 

 abbiamo sono tanto brevi, che non permettono assolutamente fare con sicurezza 

 tali identificazioni. 



C. triceromegas Silvestri appears to be a Cryptotermes and is 

 closely related to thompsonae. 



The deeply serrate front margin of the pronotum of the soldier 

 is a striking character in thompsonae. 



This species is named in honor of Dr. Caroline Burling Thompson, 

 Professor of Zoology at Wellesley College, Wellesley, Mass., in recog- 

 nition of her valuable work on the morphology of termites. 



Type locality. — Ancon, Canal Zone, Panama. 



Described from a series of winged and dealated adults, collected at 

 the type locality by H. F. Dietz, " V-T." " 9-11-16, 1919 "; Dietz Ace. 

 No. G. 541, Hopk. U. S. No. 14174; collected flying at night in room 

 in Hotel Tivoli. 



Type, winged adult.— Cat. No. 24569, U.S.N.M. 



" Jenaische Zeitschrift fiir Medlzin und Naturwissenshaft, vol. 7, 1871-1873, p. 341, 

 flote 3. 



"Redia, vol. 1, 1903, p. 26. 



