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1885. ] Entomology. 401 
desmus and Craspedosoma are very well defined. The charac- 
teristics given by that excellent author are, in extenso, as fol- 
ws: 
re mus.—Mandibulz aie senis, pro dente molari lobo etree in- 
struct, Lamina labialis maxima, tertiam pore stipitum labialum et maxillari 
sejungens. Stili ‘lin opie bidentes. rit i L fee asthinle Rigs ae“ ses 
vi oo m pri mos ter io Tongi lonan quam sexto. Stigmata odorifera in 
s Dien 0.5; 7,9) 1 13, 15-19 sita. Segmenta ieri eaves partita; pars 
Siaitiot lateribus valde: explanata, Segme entum sie ngulo pa cetera E recer a 
binis paribus pedum instructa ; numerus segmentor ve agi vs asap prima libera 
t ia i m se 
omn cu 
loiigior quam tertius, Valvulæ anales valde conve Cor orpus non contractile. 
Mas: Par prius pedum segmenti epa in — ipaa iie tlt confor- 
matum. Paria pedum 30. Femina: Paria pedum A 
EEn pectinibus denis; dente molari magno. Lamina 
nba s magna, tertiam partem stipitum labia lium cere sejungens. Stili linguales 
triden Oculi ocellis uiultiserialte, Antenne articulo penultimo longiore quam 
. Stigm 
rimo; tertio lo iore a 
strictura transversa partita; pars posterior plus vel minus dilatata. Segmentum secun- 
dum, cubed bes: om que pediferum singulo pare cetera segmenta binis paribus pe- 
dum instructa ; nu $ segmentorum 30 vel minor. Sterna omnia libera. Pedes 
primi et — stein i articulati, ceteri = -articulati; articulus pedum quartus go 
gissimus, | ongior quam ultimus, Valvulze meee angulatim convex. Corpus 
turbinem vel spiram contractile. Mas: Segmentum yaar leviter, septimum 
vald tum. Utrumque par aari segment septimi in organa copulationis ob- 
tecta conformatum. Paria pedum 48 vel pauciora. Pedes, paribus primo, se ecundyu 
rina ange exceptis, articulo aie a pulvillato. Femina: Paria pedum 50 vel 
If you should wish, for comparison, specimens of the Swedish 
Da Aona rawlinsii Leach, I request the honor of receiving 
your orders, and immediately some individuals will be sent to 
you.—Dr. Anton Stuxberg, director of the Zool, Mus. of Gothen- 
` burg, Sweden. 
[We have delayed publishing this note hoping to receive the 
specimens of Craspedosoma, in order to ascertain whether we 
have made a mistake in referring the myriopod to Polydesmus, 
but thus far it has not been received.—4A. S. P. 
Aquatic CATERPILLARS.—Apropros of our = on the habits 
i NATURALIST for 
gills, e larva, whic 
uated posteriorly. The gills are in the form of unbranched tubu- 
lar appendages of the second and third thoracic and of ry " ~ 
minal segments; they are arranged in an upper ane a o 
group; the number of gills varies somewhat. The stigmata of the 
tracheal system are, as a rule, all closed, but are easily to be dis- 
VOL, XIX,—NO, IV. 26 
z 
