
REVISIONARY CLASSIFICATION OF RUTILIINI 67 
tips of the cerci are neither bent forwards nor backwards, whereas in decora they 
are recurved and in sflendida bent forwards at the extreme tips). Other features 
_ are sufficiently well correlated with the genital differences to be of some value in 
distinguishing cryptica from splendida and decora; these include the non-infuscate 
lower calypter (lower calypter extensively smoky brown in sflendida and decora) 
and the unusually hairy lower calypter (in nearly all specimens of cryptica the lower 
calpter is haired on most of its surface, whereas in the other two species the lower 
_ calypter is hairy only inits basal depression). R. cryptica is of interest in this charac- 
_ ter because the extent and density of long dark erect hairing is much greater than 
in any other species of the subgenus Chrysorutilia (and therefore the lower calyptrae 
_ are much more hairy than in any other Rutiliine, as lower calyptral hairing is found 
_ only in the segregate Chrysorutilia and nowhere else in the tribe Rutiliini). 
Rutilia (Chrysorutilia) imperialoides sp. n. 
(Text-fig. 76) 
3g. Head. Ground colour of parafacials and genae mainly brownish orange, epistome more 
tawny yellow, parafrontals and outer margins of parafacials against the eyes blackish brown; 
genal dilations with golden green reflections in some lights (especially towards postbuccae) ; 
upper occiput dark metallic green; pollinosity mainly whitish over hind parts of genae and along 
_ parts of parafacials against the eyes, brownish yellow on upper anterior parts of genae and on 
parafacials (except against eye margins), greyish yellow on parafrontals; postorbits greyish 
white pollinose over dark ground; interfrontal area brick red. Hair of parafrontals, para- 
facials, genae and postbuccae black; occipital hair yellowish white. Vertex 0-15-0-17 of head- 
' width. Frontal setae irregular, hair-like, apices of rows not meeting. Gena 0:36-0:40 of 
_ eye-height. Parafacial very wide, about 4:5 times as wide as third antennal segment, entirely 
haired. Antennae very small, falling short of epistomal margin by much more than their 
' own length; basal segments dark reddish brown (more reddish orange on apex of segment 2), 
_ third segment brownish black except for narrow trace of orange colour at junction with second 
_ segment; third segment about twice as long as second segment. Palpireddish orange. Thoraw. 
| Mesonotum dark metallic green with variable tinges of blue and violet, and with four broad 
bold black vittae; the submedian pair of vittae stopping on scutum just behind transverse 
suture, the sublateral pair appearing to naked eye to be completely continuous but actually 
_ narrowly broken at transverse suture (the prescutal part of the sublateral vitta stopping just 
_ short of transverse suture so that prescutum is very narrowly metallic green between end of 
the black line and the suture itself); humeral calli and anterior metallic parts of prescutum 
with distinct overlay of white pollinosity, supra-alar area only with an exceedingly thin trace 
of whitish pollinosity visible in some lights (i.e. no definite white pollinose supra-alar spots). 
_ Scutellum metallic dark green to violet). Sides of thorax black with metallic dark green to 
' violaceous area on upper sternopleuron and on disc of mesopleuron; the mesopleural metallic 
area overlaid by white spot of thick pollinosity (most conspicuous from above). Thoracic 
hair (including that of suprasquamal ridge) entirely black. Wings. Basicosta black. Wing 
membrane clear hyaline (except for usual brown sub-basal mark). First basal cell with micro- 
trichia along its length. Calyptrae yellowish white with some very faint trace of yellowish brown 
suffusion. Lower calypter almost completely bare, only a few erect dark hairs at extreme 
base of basal depression adjacent to suprasquamal ridge. Legs. Black with black hair. Hind 
tibia with ad fringe short, especially on apical third, and without pd setae or with one minute 
submedian fd setula. Abdomen. Dark reddish brown with a broad black conspicuous median 
_ vitta and with metallic areas on all tergites which range from cupreous to blue-green. Metallic 
areas arranged as follows: transverse strip on each side of Tr + 2; band on each side of T3 
