SUBFAMILY MARGARODINAE 93 



Xeomargarodes Green. The genus Neomargarodes contains a 

 single species, erythrocephala Green, based upon males collected in Al- 

 geria. 



Margarodes Guilding. A part of the species of Margarodes have 

 been based upon characters drawn from the scale alone. Such charac- 

 ters have been shown to be worthless and consequently the characters 

 necessary for the differentiation of the fourteen recognized species have 

 not been indicated. The following characters drawn in the main from 

 the papers of Green, who figures a prothoracic leg of six of the species, 

 may be found useful in separating the species. There are four European 

 species, gallica Signoret from France with nine segmented antennae, 

 polonicus Linnaeus from southern Europe on Scleranthus with eight 

 segmented antennae, perrisii Signoret from France with seven segment- 

 ed antennae, and mediterraneus Silvestri from Italy on Cynodon with 

 seven segmented antennae. This latter species has the profemur as long 

 as its tibia and tarsus and claw together and the ventral surface of the 

 profemur and the surface of the protibia bears several large setae. A 

 species, hameli Brandt, from the borderland between Europe and Asia, 

 in Armenia on Poa, has nine segmented antennae. The two South 

 African species, trimeni Giard and capensis Giard, from Cape Colony, 

 probably from the nests of termites, are easily separated. The pro- 

 femur is shorter than the tibia and tarsus and claw together in trimenii 

 and the ventral surface of the profemur bears only a few small scattered 

 setae while the protibia bears a few more arranged in a single trans- 

 serse row. In capensis the profemur is longer than its tibia and tarsus 

 and claw together and the ventral surface of the profemur bears sev- 

 eral minute setae while the protibia is glabrous. There are three species 

 described from India by Green, indicus of which the antenna is unknown 

 and in which the profemur is longer than its tibia and tarsus and claw 

 together and in which the profemur bears four or five small setae on 

 the ventral aspect and its protibia bears two setae on each side; papil- 

 losus has seven segmented antennae and its profemur is subequal in 

 length to the combined tibia, tarsus, and claw and bears several small 

 setae on the ventral aspect of the profemur and four or five setae on the 

 protibia; and niger which differs from all of the other species so far 

 as known in having the profemur three or four times as long as its 

 tibia and tarsus and claw together, this latter combined structure is in 

 the form of a strongly chitinized toothed claw. The South American 

 species, vitium Giard from Chili on Vitus, has eight segmented antennae. 

 The same number is present in hiemalis Cockerell from New Mexico. 

 Of the two West Indian species, formicarum Guilding from Antigua and 

 Bahama Islands from the nests of ants, has seven segmented antennae 

 and the profemur is much longer than its combined tibia and tarsus 

 and claw and bears numerous long large setae on the ventral aspect 

 of the profemur and one on each side of the protibia, while the form 

 of the prothoracic legs and the antennae of rileyi Giard from West 

 Indies and Florida Keys is unknown. The figures of Green suggest that 

 good diagnostic characters are to be found in the prothoracic legs and 

 it is to be hoped that those having authentic specimens of the other 

 species will publish figures of these structures. 



