Article beginning on page 346.
Psyche 8:346-348, 1897.

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[April 1899.
and Jefferson Counties in the central
part of the State., The earliest and
latest date of its capture are June thirti- eth and October twenty-sixth. Accord-
ing to Prof. Charles Woodworth, formerly Entomologist of the Arkansas Agricul-
tural Experiment Station, at present of
the University of California, this species sometimes lays its eggs in small holes
in rocks in stonefences. It is a larger
species than would appear from Scud-
der's measurements which are 25 mm.
for male and female. Average specimens
in my collection measure as follows :
Length of body male, 25 mm. female
32 mm.
Length of hind femora male, I 74 mm.
'
female 18 mm.
The tegmina vary from one and a half
times the length of the pronotum to the
length (male) of the abdomen. The ,
cerci are quite variable and the under
side is frequently red as in MeZ, clypea- tus Scudd. which is possibly only a syno- nym of Mel, viola.
THE MOUTHPARTS OF THE NEMATOCEROUS DIPTERA, 111. BY VERNON L. KELLOGG, STANFORD UNINERSITY. DIXIDAE.
ing of labrum-epipharynx (fig. 4, 2. ep) , mandibles (fig. 4, ma') which are short, Dixa sp. The females of Dixa weakly chitinized, trowel-shaped, with possess a mouth structure (see fig. 4)
truncate, distal margin with fine, deep
like those already described, consist- dentations; maxillae (fig. 4, mx) with 5-segmented palpus and max-
illar lobe weakly chitinized
but long and conspicuous ;'
strong labium (fig. 4, Zi) with
free paraglossae and glossae
fused to form a membranous
median lobe; and hypopJiay-
ynx (fig. 4, hyp) of usual
type.
PSYCHODIDAE.
Psychoda, sp. Psychodu (see
Fig. 47
of Dha sP.9 ?; 2- ef
f\ has no mandibles and the labium
labnim-epipharynx, d mandible, mx max-
illa, mx / maxillar lobe, im. j maxillar pal- presents but two terminal lobes. The
pus, fi labium, & paraglossa, gl glossa, hyp /abrztm-@ipharyzx (fig. 5, 2. ej) is short, hypopharynx. broad, triangular. The axillat (fig.



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~pril i8̤o. PSYCHE. 347
5, mx) are composed of a conspicuous
maxillar lobe, which is broad and plate- like, with margins dorsal and ventral,
and which is about as long as the
labium, and of a long 4-segmented
palpus which bears many scales. The
labium (fig. 5, IS) is short, broad, com- posed of a small, strongly chitinized,
basal sclerite, and two large, fleshy,
terminal lobes, the paraglossae, concave on their inner faces. The hypopharynx
(fig. 5, hyp) is broad at base, tapering quickly to a sharp point anteriorly and
is fringed with long strong hairs.
Fig. 5, Mouthparts of Psychoda sp; Z6
labrum-epipharnyx, mx maxilla, mx. I max- illar lobe, mx.j maxillar palpus, It labium, jg paraglossa, hyp hypopharynx.
Pe~icoma sp. The mouthparts of
Pericoma are essentially like those of
Psycho&. The maxillar lobes are broad
delicate, plate-like. The hypopharnyx
is fringed with long hairs. The labial
lobes bear many short, strong, socketed
hairs.
I have not been able to examine
Phlebotomus whose females, according
to Becker, possess piercing mouthparts,
with long, strong, mandibles finely
dentate along the inner margin, and
with maxillar lobes also long, well-
chitinized and with truncate distal
margin with strong dentation. All of
the mouthparts of Phkbutumus are long
and slender, while those of Psychoda
and Pericoma are short and broad.
Catucha sf. (two species studied).
The mouthparts of Catocka (fig. 6)
consist of labrum-epiphayym (fig. 6,
l. @) maxillae (fig. 6 mx) which are
represented by long 5-segmented palpi
only, no maxillar lobe being present,
and a short broad labium (fig. 6 5)
Fig. 6, Mouthparts of Catocfia sp ; Z. e$ labrum-epipharynx, mx maxilla, Zi labium, å´p paraglossa, ..$ glossa.
with lateral paraglossae and fused
glossae. I was unable to find a hyjo-
pharynx, which, however, is probably




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348 PSYCHE. [April 1899.
present, the minte size of the mouth-
parts making their dissection' very
difficult.
Cecidomyia sp. The mouthparts of
Cecithmyia sp. are essentially like those of Catocha.
S~iophiZa sp. Sciophila (fig. 7) pre-
sents an instructive mouthparts condi-
Fig. 7, Mouthparts of Sciophila sp; Zb
labrum, ep epipharynx, wx maxilla, mx. I maxillar lobe, mx. p maxillar palpus, li labium, hyp hypopharynx.
tion.
Mandibles are wanting, and the
maxillar lobe is small and rudimentary.
The labrum-efifhayj~nx is separable,
after softening in hot K 0 H, into its
component parts, a well chitinized,
sharp, tapering, pointed labrum (fig. 7
IV) and a broader membranous epiphar-
ynx (fig. 7 ep) with irregular dentations at apex. The maxillae (fig. 7 mx)
present an elongate basal part
with a median longitudinal region
strongly chitinized, a distinct palpifer from which arises the 5-segmented
palpus (mx. p) and a small but distinct
terminal lobe (mx. 0. The labium (fig.
7 li) presents a basal sclerite in which, as in the maxillae, a strongly chitinized longitudinal region is conspicuous, in
each half; the paraglossae are large
thick, fleshy, concave on inner face, and show no signs of pseudo-tracheae ; the
fused glossae are represented by a very
delicate median membranous lobe.
The @of /larynx (fig. 7 hw>) is much like the epipharynx in condition being rather broad, and irregularly dentate at apex.
Platyura sp. Mouthparts essentially
like those of SciophiZa. Hypopharynx
broadly triangular ; maxillae with 5-seg- mented palpus and weak, spoon-like,
terminal lobe as long as first palpar
segment. Labium with free, elongate
paraglossae; glossae fused to form a
single, short, broad, median lobe.
Mycetophila (two species). The
genus shows a specialization in its
mouthparts distinctly beyond the con-
ditions presented by Sciophila and Plat- yura. The maxillae have no lobes, and
the maxillary palpi are 4-segmented.
The labial lobes are all fused to form a single broad plate-like lobe, in which
two large tracheal trunks (or pseudo-
tracheal trunks) are visible.




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