f^4 
I>.R( 
KiKLYX INSTITUT 
its 
while- 
■and-blackncss 
/). 
atrati 
IS 111" similar 
mil 
IllltC tl 
i-al)ecuke, in n 
Ml-SKUM. SCIENCE BULLETIN 2. 4. 
re reallv (|uite different from that of 
,]iical species of the crows, and its 
rticuhir, set it apart from all these 
species. 
Female, length j.j mm.; width 1.51) mm.; head, length .88 mm., 
width I. mm.: gmund ccilor milky white, with strong blackish Ijrnwn 
bands on head and blotches on thorax, legs and abdomen, but the al)domi- 
nal lilotches small and fading out on the posterior segments. 
Head with margins forming almost an equilateral triangle but with 
base (occipital margin) hmgcr than the sides (lateral marginsj. and 
with the anterior angle abni]iil\ Imt not widely truncate; a few small 
prickle-hairs in front of clypcal suture, a longish hair from each eye 
and three not very long hairs on each tem[)oral margin ; trabeculje very 
small ; antennae small ; a pair of very well marked l)lackish brown occipital 
bands continued as antenna! bands, running forward to the clypeal 
sutures, these bands of even width and sharp distinctness thnmghout 
their length; even beyond the sutures twd small Mntclics may lie lonked 
on as continuations of these bands. 
Prothorax very short and with flatly rounded posterior margin 
without blotches. Metathorax rather of shape of prothorax but larger 
and with the curving outlines more marked; its posterior margin is 
flatly rounded and Ijears an obscure series of short fine hairs, about 
seven on each side of the middle ; there are also two short w^eak hairs 
in each lateral angle ; a dark blotch in each antero-lateral angle ; legs 
with small blackish semi-annular markings at tip of each femur. 
.\lid>imen short and broad, not hairy, although there are series of 
inconspicuiius weak hairs along tlie posterior margins of the dorsal sur- 
face of the segments; segments i to 6 each have a narrow, elongate 
diagonal lateral blotch enclosing or adjacent to the spiracle on each side, 
these blotches growing less in size and conspicuousness from the first 
segment backward; genital blotches, on the ventral surface, consisting 
simply of three very small but distinct flecks, one lying lietwecn the 
other two as if guarded by them. 
Male, length 2.33 mm.; width, 1.27 mm.; head, length, .82 mm., 
widih .1)7 mm.; the lesser size is especialh' noticeable in the abdomen; 
the lateral blotches of the abdomen are larger and are distinct on all 
the segments; the genitalia nf unusual form, the parameres being short. 
Xii^.MfS TKi.\xi',i-i..\Trs Xitzsch, \ar. Ai.riiA. var. now 
Males and females Inmi Mc^^aicstris autarctica ( v^onth 
Tnipical .\tl;intic: R. l\ .M.. i.V'-M and frmn Occanodroma 
lciicorli,Ht ( Xnrth Tr.ipical Atlantic: K. C. M.. IJ'JO). 
is Xiniiiis (if \ari(iiis gulls and terns has a 
nut and br<i;ider in iiroiiortion to its length 
ss narrowed 
the si.ccies t 
