Septembar iSgg.] 



SUPPLEMENT TO PSYCHE. 



Ae it runs over the ground, this insect 

 looks extremely like a bit of thistle-down 

 blown by a gentle breeze. The resemblance 

 is so extraordinary, that it is difficult to 

 realize that it is an insect until it is actually 

 in the killing-bottle. It proceeds in a zigzag 



jerky manner, so increasing the illusion. 

 What is the purpose of this mimicry, I do 

 not know; these creatures possess powerful 

 stings, and most of the allied forms seem to 

 be warningly colored — usually contrasts of 

 black and red. T. D. A. Ckll. 



New Species of Coccidae. 



liV T. D. A. COCKERELI.. 



Aspidiotus hartii, n. sp. — J scales irreg- 

 ular, subcircular to oval, about limm.diam., 

 moderately convex, dull brownish-gray, with 

 a slight purplish tint; first skin partly cov- 

 ered or entirely exposed, shining pale straw- 

 color, nearly central. When removed, the 

 scales leave a conspicuous white mark, with 

 no black ring. 



$ scale colored like th:it of the ?, small, 

 elongate, with the exuviae near one end. 



? brown, becoming pale lemon yellow 

 when boiled in soda. 5 groups of ventral 

 glands, median of about 4, cephalolatemls 

 9, caudolaterals 6 to 7. Anal orifice posterior 

 to level of caudolateral glands, but some 

 distance from hind end. No long tubular 

 glands at bases of lobes. Two pairs of lobes 

 only ; median large with parallel sides and 

 gently rounded siibtruncate ends, slightly 

 diverging, not contiguous, obscurely notched 

 at end towards outer side. Second lobes 

 similar in shape, but much smaller. Two 

 rather stout branched plates between the 

 median lobes, and two between ist and 2nd 

 lobes. Margin cephalad of 2nd lobe with 

 first three stout strongly branched plates 

 close together, then three equally long but 

 not so stout and only slightly branched 

 plates further apart. Then two very slender 

 small plates, then a long interval, then the 

 margin coarsely serrate, with about 6 serra- 

 tions. 



Hub. Trinidad, West Indies, in great 

 numbers on tubers of yam. Sent by Mr. 

 Hart, of the Royal Botanic Gardens. The 

 occurrence of an Afpidiotiis on yams was 



hardly expected ; though Mr. Barber had 

 sent me from Antigua a new Lecaniiim (Z,. 

 batatae Ckll. ined.) on sweet potato tubers. 

 The present insect is allied to Asphh'o/us 

 sacchari Oi.\\., 1S93. 



Aspidiotus sphaerioides, n. sp. — $ scale 

 circular, rather over i mm. diam., in num- 

 bers on the leaf, moderately convex, dark 

 reddish-brown, with the part covering the 

 exuviae indicated by a pale raised ring. 

 When rubbed, the exuviae are uncovered and 

 appear shining black. Removed from the 

 plant, the scale leaves a whitish patch, sur- 

 rounded by a blackish ring. 



$ pale yellow, circular, mouth-parts about 

 as far from anterior margin as their length. 

 Anterior margin with a rowof about 9 strong 

 spines or stout hairs, such as I have seen in 

 no other species. Anal orifice oval, a fair 

 distance from hind end, but posterior to level 

 of caudolateral groups of glands. 5 groups 

 of ventral glands, caudolaterals of 3, cepha- 

 lolaterals 4, median 3. 



Three pairs of well-developed lobes, small 

 but distinct, about equal in size, rounded, 

 with a slight tendency to be notched on each 

 side. Branched plates, hardly longer than 

 the lobes, between them. Margin cephalad 

 of 3rd lobe very coarsely serrate, with five 

 large serrations, the bases of these all fringed 

 with numerous tubular glands. Long tubu- 

 lar glands at bases of lobes ; those cephalad 

 of median lobes, and in the interval between 

 2nd and 3rd lobes much the longest: that 

 cephalad of 3rd lobe next longest. 



Hab. On leaves of New Zealand flax. 



