98 Claude Fuller 



Soldiers. Head yellowish, elongate oval, narrowing in front; 

 mandibles black with pale bases; labrum reaching well beyond 

 basal half of mandibles ; clypeus somewhat produced, front mar- 

 gin faintly incurvate, sides rounding into front margin. Antennae 

 XIV jointed; III and IV noticeably small; III often faintly 

 longer than IV, or III, IV, V increasing in width and length; 

 very rarely XIII jointed when III is long and represents III and 

 IV of XIV expression; even more rarely XII jointed when III 

 very long and represents III, IV, V of XIV expression. Total 

 length 3 to 5 • 4 ; head vrith mandibles 1 • 37 to 1 • 62 ; left mandible 

 • 57 to • 59 ; headwidth • 70 to 0-93. 



Worker Major: (larger). Head almost as wide as long, sides 

 parallel; headwidth 1 ' 00 to 1*06; antenna XIV jointed; III. 

 IV, V annular gradually increasing in length and width. 



Worlter Major: (lesser). Head longer than wide, sides parallel; 

 headwidth • 90 to • 96 ; antennae as with larger major or 

 rarely XIII when IV long and plainly compound. 



Worker Minor: Head sub-circular; antennae XIV, jointed; III 

 and IV short annular, equal or III a shade longer than IV ; head- 

 width, ordinarily, 0*69 to 0-75 (or more rarely 0-69 to 0*81). 



Localities: Natal: Haviland Rail, Muden, Durban, Bellair, 

 Illovo Lagoon. ZULULAND: Umfolosi Rail. TRANSVAAL: 

 Pretoria, Johannesburg, Witbank, De Wildt, Pienaars River 

 Rail 



Remarks: With regard to the diameter of the eyes, I have 

 found none of the imagos from Natal exhibiting a greater diameter 

 than 0- 33; those from Pretoria are very regularly 0- 35; those 

 from Johannesburg and De Wildt range from 0- 30 to 0-35. 

 The mean size of the heads of the soldiers is seemingly dependent 

 upon the nest-series to which they belong. Thus m one Pretoria 

 series the headwndth is 0* 72 to 0- 78 and tow^ards the bottom 

 of the range, in another, it is 0-80 to 0: 85. In the Johannes- 

 burg series the range is 0- 91 to 0* 93. In a Durban series, 

 0-84 to 0:93. 



Microiermes havilandi, form inter medius f.nov. 



Certain imagos from Klerksdorp, Transvaal, and Bloemfontein, 

 O.F.S., stand apart on account of a distinct yellow streak per- 

 vading the wdng membrane between R. and M., by the greater 

 diameter of the eyes, 0-37 to 0* 39, and by the more bilobed 

 condition of the hind margins of the meso- and metanotum, par- 

 ticularly the latter. The antennae are XVII jointed but exhibit 

 the same pattern as the XVII expressions of the typical form. 



