40 ACARIDEA. 
Subfam. ANALGESINAL. 
[Trouessart, Les Sarcopt. plumicoles, 1° part. p. 5 (1885). ] 
MEGNINIA. 
Megninia, Berlese, Acari, Myr., et Scorp. Ital. fase. iv. (1883). 
1. Megninia pteroglossorum, sp. n. (Tab. XXI. figg. 5, 5a, 0.) 
3. Corpus subovatum, colore ex albido-griseo, nitidulum, convexulum, Pedem paria anteriora inter se 
eequales, breves. Pedes tertii incrassati, longi, abdominis marginem posteriorem superantes, articulo 
ultimo acuto, unguifero, caruncula adhexsiva induto, ceteris articulis cylindricis. Pedes quarti breves, 
tenues, in articulo ultimo ungues duo ferentes, abdominis marginem vix attingentes. Appendices anales 
lamelliformes, acuti, margine interiore integro, exteriore incisuris duabus sat profundis sinuato. Pars 
posterior appendicule utriusque lateris setas duas longas ferens, seta brevior in lobo inter incisuras con- 
fecto ; longissima juxta basin appendicule externe sita. Disci adhewsivi prope marginem posticum ante 
appendiculas in ipso abdomine siti, magni. Epimera primi pedum paris in linea mediana ad laminam 
sternalem formandam sese conjungunt. 
Long. corp. circa 0-5 millim. 
Q nymphe. Corpore oblonge ovato, antice latiore, marginem posticum versus attenuatum, postice rotundatum. 
Pedes breves, corporis margini inserti, sparse setigeri. Pedes anteriores crassiores, breviores, posteriores 
tenuiores, longiores. Epimera primi paris in linea mediana sese tangentia, secundi paris brevia, libera. 
Margo posterior abdominis integer, setis quatuor armatus, internis brevioribus, externis longioribus. 
Long. corp. circa 9°5 millim. 
Larva hexapoda corpore oblongo, margine integro, super pedum insertionem angulariter protracto. 
Hab. Guatemata, Retalhuleu (Stol/). In remigum vexillis Pteroglosst torquati 
parasita gregatim vitam degit. 
Body of the male ovoid, greyish-white, transparent, shining, convex. Anterior pairs 
of legs of equal length, short. Third pair of legs very thick, long, protruding over the 
hind margin of the body, their last joint pointed, bearing claws, the other joints cylin- 
drical. Fourth pair of legs short, slender, with two teeth on their tarsus, hardly 
reaching the end of the body. The anal appendices are pointed, lamelliform, their 
inner margin straight, their outer margin sinuated, with two profound incisures; the 
posterior portion of the appendices bears two long bristles, and there is a short bristle 
on the lobe between the two incisures; the adhesive discs are large and situated near 
the posterior margin of the body before the appendices. The epimera of the fore legs 
of both sides are united into a common sternal plate. 
Body of the female (nymph) oblong, somewhat thinner towards the posterior end, 
rounded behind. ‘The legs are short and inserted at the margin of the body; the two 
first pairs are a little thicker and shorter than the hind pairs. The epimera are brown 
and have the appearance of narrow hard bands; those of the fore legs of each side 
reach the median line, those of the second pair remain separated, The hind margin 
of the body bears four bristles; in young specimens it is a little excavated. 
The hexapod larva is oblong, the side-margin forming a sort of angle over the 
insertion of the legs. 
