1889.] 353 



usual. Four groups of ventral glands, the anterior group consisting of three or 

 four, and the posterior of two glands. The anus is situated just above the base of 

 the median lobes. There is a considerable similarity between this species and A. 

 Jicus, but the plates are different, and the scale is completely different, the one oval, 

 greyish-white and flat, the other almost black, convex and circular. 

 Found on Dictyospermum album from Demerara (Mclntire). 



11. Aspibiotus acacia, n. sp. (pi. v, figs. 4 and 6). 



? scale circular, convex, exuviee in the centre, of a rather waxy nature, about 

 1 mm. diameter. Scale colour of the bark, with larval skin orange-yellow. 



? insect segmented, with thoracic region contracted, whilst the base of the 

 abdomen is dilated. There are no groups of abdominal ventral glands, but on each 

 side of the mouth is a group of about fifteen, and posterior to this on each side is a 

 group of about ten glands. Each of these groups is placed just anterior to a spiracle. 

 One pair of well developed lobes, the serrated posterior margins of which slope 

 upwards outwardly, rectangular. The margin is crenate, with a glandular opening 

 at each point of indentation ; three in all. A small spine is placed on the margin 

 of each rounded tooth. The indentations suggest boundaries of rudimentary seg- 

 ments. One small simple marginal plate adjacent to the outer lateral margin of the 

 median lobes. Rows of simple spinning glandular openings extending anteriorly. 

 On the ventral side there appears to be a ventral plate terminating in a crescent- 

 shape form, as shown in the figure. 



Found on Acacia pycnantha (golden wattle) from Tasmania ; received from my 

 friend Mr. William Tait, of Oporto. 



This species shows, as will be seen, some unusual characters, but, judging from 

 the position of the exuviae, I think it may be placed in the genus Aspidiotus. 



EXPLANATION OF PLATE V. 



Fig. 1 — A. longispina, caudal segments much magnified. 



,, 2 — A. dictyospermi, do. do. 



,, 3 — A. articulatus, do. do. 



„ 4 — A. acacice, do. do. 

 ,, 5- — A. articulatus, magnified 50 times. 

 „ 6 — A. acacia, do. 



P.S. — Any slight discrepancies between the description and corresponding figure 

 arise from the distance which separates the author from the engraver. 



Villa Nova de Graya, Portugal : 

 May llth, 1889. 



Microdus calculator, Fab. — Mr. C. W. Dale, a few months ago, sent me a box 



of Ichneumons to name, principally very old insects, but among them is a fine fresh 



female of Microdus calculator, F., taken by himself in the New Forest; this is very 



interesting, as the Rev. T. A. Marshall, in his monograph of the Braconidce, says 



that it seems to have been found in England only by Curtis, and that no recent 



specimens are forthcoming. Curtis took both male and female in the same locality, 



viz., the New Forest. This specimen has the hind femora entirely black. — John B. 



Bridgman, Norwich : July 13th, 1889. 



G G 



