8 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



The two species, Genus A sp. and Genus B sp., are apparently both new species and 

 genera, but no definite statement can be made here as the females are still being 

 studied. In the INGLISIA group only one species (/. theobromae) was studied in 

 detail, but 3 specimens of another (Ceroplastodes chiton Green) were compared with 

 it, and their characters used in the discussion. 



Most of the species were obtained from workers all over the world, who generously 

 made material from their collections available, or collected material specially for the 

 purpose of this study. The specimens were usually received in 70% alcohol, but 

 specimens of 4 species received from J. Rehacek were remounted from Swann's 

 mountant. In most cases the material received was already identified ; unidentified 

 material obtained from various sources was identified by K. Boratynski, G. De Lotto 

 and D. J. Williams. The males of six species were collected by myself, one of them 

 (Ctenochiton sp.) in Stellenbosch, South Africa, and the rest at the Imperial College 

 Field Station, Sunninghill, Berks., where their habitats were known to Dr. 

 Boratynski. 



In nearly all cases, 10 specimens of each species were examined, the various 

 measurements taken and the setae counted. For each sample the range of variation 

 was recorded and the average calculated. The specimens were prepared for micro- 

 scopic study according to the method described by Ghauri (1962). It was found, 

 however, that 45 minutes in KOH was usually the shortest period needed to clear 

 the specimens and often several hours were necessary for the larger specimens. 

 Only one stain, Chlorazol Black E, was used and the specimens were stained for one 

 hour. 



In making the illustrations, the same techniques and procedure were followed as 

 in Giliomee (1961). 



In order to standardize the measurements and prevent repetition in the individual 

 descriptions, the way in which the various structures were measured is explained in 

 detail below (see also Text-fig. 1). 



The body length was measured from the anterior margin of the head to the apex of 

 the penial sheath. 



The head exhibits no definite structure posterodorsally and its length was there- 

 fore measured from the anterior margin to the first ridge on the thorax, the pronotal 

 ridge ; its width was measured across the genae. The external margin of the cornea 

 is not very distinct and the internal diameter was therefore taken. Antenna: 

 The length of the scape was measured along the dorsal margin, the width across 

 the middle of the segment ; the length of the pedicel was measured from the 

 articular process posteroventrally to the apex of the segment, and the maximum 

 width was taken ; the width of segments III and X was measured where they are 

 widest, but that of segments IV-IX across the middle because they are sometimes 

 rather wider at the apex. 



The length of the thorax was measured from the pronotal ridge to the posterior 

 margin of the mesopostphragma (the latter was also used by Ghauri (1962) in 

 estimating the length of the thorax of the Diaspididae) . The length of the prescutum 



