210 BULLETIN 108, UNITED STATES NATIONAL MUSEUM. 



Fig. 1. Longitudinal section through body of an old first-form qu>?en of Reticiditermes 

 flavipes. X 20. 



2. Longitudinal section through the body of a second-form queen (with distended 



ahdomen) oi Reticulitermes flavipes . X 20. 



3. Longitudinal section through the body of an egg-lajing third-form queen of 



Reticulitermes flavipes. The extent of the egg tubes is less than in the other 

 two forms, but the ova shown happen to be in the oldest stage and are 

 therefore larger. X 20. 



4. Longitudinal section through the body of a mature first-form queen of Kasu- 



titermes morio. X 20. 



Plate 28. 



Reticulitermes flavipes and Nasutitermes morio. 



Photomicrographs of longitudinal microtome sections through the abdomens of the 

 three different types of egg-lajT.ng queens of Reticulitermes flavipes, contrasted with 

 a first-form queen of Nasutitermes morio. The ripe eggs are the large oblong cells 

 with yolk spheres; they occupy more space in the abdomen of the first form queens 

 and the eggs are also more numerous. (After Thompson and Snyder.) 

 Fig. 1. View of a longitudinal section of an old first form queen of Reticulitermes 

 flavipes. 

 2. View of a longitudinal section of a second form queen (with distended 

 abdomen) of R. flavipes. 



Plate 29. 



Photomicrographs of longitudinal microtome sections through the abdomens of the 



three different types of egg-laying queens of Reticulitermes flavipes, contrasted 



with a first form of Nasutitermes morio. The ripe eggs are the large oblong cells 



with yolk spheres; they occupy more space in the abdomen of the first form 



queens and the eggs are also more numerous. (After Thompson and Snyder.) 



Fig. 1. View of a longitudinal section of an egg-laying third-form queen of R. 



flavipes. 



2. View of a longitudinal section of a mature first-form queen of Nasutitermes 



morio. 



Plate 30. 



Fig. 1. Second form reproductive individuals with wing pads of Reticulitermes tibialis; 

 one king and three queens. Colorado Springs, Colorado. X 10. 

 2. Reticulitermes flavipes. Queen of the third form, one of seventeen from a large 

 colony at Falls Church, Virginia. X 5. 



Plate 31. 



Reticulitermes hesperus Banks. 



Tentacle-like projections or tunnels constructed of excrement and earth across a con- 

 crete wall for a distance of 8 feet. The nucleus of the structure is the end of a beam 

 set in the wall, and from it radiate several tunnels. Note the granular structure. 

 Los Angeles, California. Courtesy Popular Mechanics, Dec, 1918. 



Plate 32. 

 Reticulitermes humilis, var. hoferi. 

 Work in the dry, solid, hard wood of an oak stump, Nogales, Arizona. 



