UKI’OHT ON KCONOMIC ENTOMOLOGY 
217 
Head, body and legs, straw yellow ; dorsiini of thorax and of abdomen, wdtb blackish 
markings ; wings with a slight brownish tinge. The eyes meet together for a short 
distance in the median line 
alioye in the case of the 
male, hut are separated by 
a broad front in the female 
{>!e(‘ Jj(/iirc). t)n the dorsum 
of the thorax the dark 
markings, \Yhich are a pair 
of longitudinal stripes not 
reaching the hind margin, 
are coyered with a greyish 
Idoom and, consequently, 
not yeiy conspicuous ; tins 
l)loom is also present on 
the abdomen, but here the 
markings are much more 
distinct, especially in the 
female, in which the third 
segment, as also the fourth 
segment with the exception 
of the hind margin, is 
entirely black or blackish. 
In the female the second 
segment is marked with a 
Fig. .'>2.— 1 be 'I unibu Fly. Cyf G^bubei. ' hlackisll (pUldl atC median 
blotch, and has a similarly 
coloured hind border, broadening towards the sides, while the first segment has a narrow 
dark hind margin. In the male these markings are not so extensiye; the dark hind 
margin to the second segment is interrupted on each side of the median blotch, which 
is triangular in shape, and there is a yellow area of considerable size on the proximal half 
of the third segment, on either side of a blackish median quadrate blotch ; the fourth 
segment is similarly hut less conspicuously' marked. 
“ Care is necessary in order not to confuse I'. Grind)., with AiwlDiieixnaijia 
hihdla, Fahr. (the ‘ Floor-Maggot Fly ’), which is found in the same parts of Africa and 
presents a deceptiye resend)lance to the Tumhu fly in coloration, since it also has a ])ale 
yellow head and body, with dark markings on the thorax, and the distal half of the 
abdomen blackish. Without going too deeply into details, howeyer, it may ho said that 
the two species may be distinguished by the fact that in . 1 . Inte.dla the eyes are wide 
a])art in both sexes, the body is narrower and more elongate, the hypoi)ygium of the 
male is in the form of a conspicuous foiuvai'dly-directed hook, for which the ventral half 
of the penultimate segment of the abdomen serves as a sheath ; and, lastly, by the fact 
that the second abdominal segment in the female is twice the length of the same segment 
in the male. The ‘ floor-maggot ’ itself is devoid of the characteristic spines described 
above in the case of the Tundm-lly larva, and the posterior surface of the last segment, 
instead of being vertical, as in the latter, slopes backwards at an angle of 45”, and has 
Hcpruduced by kind permission of (ho P’.ditor (Col. Jirnce) of the .Immial of Ihr fiV/c/ Jniiii Malini/ Corps. 
