6 ARKIV FÖR ZOOLOGI. BAND 3. N:0 28. 



twice as broad as tlie rest, finely reticulated and rounded at 

 the end so as to form an envelope to tlie mandibles and tlie lobes 

 of the maxillarj^ plates ; they are provided on the exteriör edge 

 a Httle before the middle with an inwardly curved, thin appen- 

 dage which ends in two large and se ver al small slips. 



The maxillary plates are strong chitinous, fused together 

 and form a long projection. which extends forwards as far as 

 to the anterior edge of the second free joint of the maxillary 

 palps. 



The projection is provided at the top with a very remark- 

 able, strong chitinous, horseshoe shaped perpendicular appen- 

 dage. Along the lateral edges of the projection is a pair of 

 thin, membranaceous, longitudinally striated plates, with roun- 

 ded edge, which are curled upwards and most probably together 

 with the above described maxillary lobes act as an envelope 

 to the mandibles and the other mouth parts. 



The maxillary plates are distally divided in two pairs of 

 lobes of which one (il) is only fringed on its proximal half , and 

 ending in a sharp point, the other (ol) which is sligthly shorter 

 and narrower is densly fringed and hairy. 



Of the interiör mouthparts I have been able to see one 

 median,' ventral, rather long and hairy lingua or hypopharynx, 

 two pairs of long, thin and hairy appendages, which correspond 

 to what OuDEMANS has observed in Megisthanus moaifensis 

 OuDMS^ and which he calls paraglossce and parepipharynges and 

 one dorsal pentagonal, anteriorly truncated plate, corresponding 

 to the epipharynx (Fig. 9). 



The maxillary palps have 4 free joints. The second joint 

 is broad and has ventrally and interiorly a conical projection, 

 which is provided with a curved featherd hair a t the top and 

 ventrally in the middle with one almost perpendicular bristle. 

 The third joint widens anteriorly and bears on the dorsal 

 side two strong, straight, sligthly feathered bristles, which are 

 twice as long as the joint, and ventrally interiorly and exteriorly 

 one shorter bristle. The fourth joint is cylindrical, slightly 

 shorter than the third, and bears ventrally one fine hair, in- 

 teriorly one, dorsally two and exteriorly one bristle of which 

 the anterior dorsal one is the largest. 



^ Nova Guinea. Resultats de Texpedition scientifique Néerlandaise a 

 la Novelle-Guinée. Acari. p. 126. Pl. III. Fig. 34. 



