02 SYEPHID.E. 



a band reaching the ridged side margins. Venter black, with two 

 pale yellow spots at base oi: 2nd, 3rd and 4th segments, resembling 

 those ot the typical form ; hind margins of segments narrowly 

 yellow, with a tendency to spread to the 2nd segment. 



49. Dideoides trilineata, sp. nov. 



(S . Verv near D. ovata. The three dark lines on the thorax 

 distinct. The elongate spots on the 2nd abdominal segment 

 naiTOwer and pointed at each end. Hind margins of 3rd and 4th 

 segments not obvious!}^ pale. Pubescence of abdomen rather pale 

 yellow, not orange, distinctly less conspicuous than in ovata., but 

 the black pubescence as conspicuous as the yellow. Edges of 

 abdomen wholly black. Rest as in D. ovata. 



One S , Britisli Museum. Myitkyina District, Upper Burma, 

 6. xi. 1907 (Capt. Whiimore). 



50. Dideoides tigerina, Big. 



Isch>/rosi/rp/ius tit/erim/s, Bigot, Anu. Soc.Ent. France, (6) v, p. 249 



(1885). 



d" 2 • Very near botli oi^ata and trilineata. Thorax aeneous, a 

 little more yellowish in the c? , greenish in the $ ; the three 

 longitudinal dark stripes as in both those species, perhaps some- 

 what less distinct. 1st abdominal band normally entire, though 

 in one 6 it is just visibly interrupted in the middle; in 

 some specimens so broad as to fill all the surface except the 

 rather broad black hind margin, 2nd and 3rd abdominal bauds as 

 in ovata, but rather broader and more yellowish than orange. 

 Edges of abdomen black, with long pale yellow pubescence only at 

 sides of 2nd segment, that on remainder of margins black, with a 

 few yellow hairs intermixed in places. Pubescence of dorsum of 

 abdomen yellow, conspicuous, but less dense than in ovata, and 

 the black pubescence on the black parts short and less noticeable 

 than in trilineata. Eacial stripe sometimes less conspicuous, and 

 antennae wholly black except for a slight paleness at base of 3rd 

 joint. Eemora entirely yellow except in one d" , in which about 

 the basal halt is pale. Eest as in ovata. 



A short series of both sexes in tlie British Museum. Lower 

 ranges, Khasi Hills, Assam, 1S78 (Chennell). Their identification 

 with Bigot's type c? is certain, from a close comparison. 



2'i/2)e in Bigot collection. 



Both of the two latter species appear distinct, although further 

 specimens and the 5 sex of trilineata must be forthcoming 

 before a final decision can be made. The kindred genus Asarcina 

 shows a disposition to form local races, judging by the excellent 

 series of such forms amongst the African species in the British 

 Museum, and Dideoides may be found to possess the same 

 tendency. The characters of my three closely allied species are 

 defined in the table perhaps as clearly as in tlie descriptions. 



