THE CADELLE 35 
minute spines, dorsal surface with four setae on each side, and with two 
pairs of sensory spots. 
No epicranial suture, epicranial halves separated by gular area, the ventral 
, epicranial margin from mandibular articulation of mandible to cardo slightly 
. concave and somewhat larger than rest of epicranial margin. Gula composed 
of a longitudinal, membranous gular area (fig. 15, II, ga) between a pair 
' of paragular plates (fig. 15, H, pgp) which probably are separated from the 
posterior epicranial margin. The gular area bears a pair of large setae. 
Epicranial setse about six in series along lateral margin of cranium, one near 
frontal suture on disk of epicranium, one opposite to this near lateral margin, 
and four small setse near occiput ; one seta on ventral surface near base of 
antennae, three small and one large setae along anterior ventral epicranial 
■ margin, and one near lateral margin of cranium. Ocelli five, near base of 
antennae, an anterior group of three and posterior group of two. 
Antennae (fig. 15, G, ant) well developed, three-jointed, semiretractile, basal 
• membrane large and semiglobular. Basal joint slightly broader and shorter 
than second joint which bears a small, fleshy, supplementary appendage and 
several small setae at distal end. Distal joint slender and bearing one long and 
i two short terminal setae. 
Mandibles (fig. 15, B) subtriangular, large, powerful, fitted for biting, bifid 
[ at tip, no molar part, a heavy spinelike process split up like a brush on inner 
margin near base, with two setae dorsally and near exterior margin. Ventral 
mouth parts (fig. 15, C) retracted, no maxillary articulating area. Cardo 
: (fig. 15, H, cd) small, with posterior chitinization transversely placed at base of 
J the equally well chitinized stipes. Stipes almost as long as frons, elongate, 
subrectangular, about three times as long as wide and much larger than cardo, 
connected with mentum along its entire inner margin. 
Maxillary mala (fig. 15, A, C, ma) single, flattened, composed of two not joint- 
like, triangular pieces one above the other, the dividing line clearly indicated on 
ventral side, indistinct toward the buccal cavity ; tip obtuse. On anterior 
margin just outside line which separates proximal and distal halves a stout, 
i short, and pointed seta. Ventral surface of terminal piece bearing one large 
f seta. Buccal surface of mala profusely covered with setae, on proximal half 
about seven very large, hooklike, and obtuse setae that look and work like a 
rake. 
Maxillary palp (fig. 15, A, C, H, mp) three- jointed, carried by a membranous, 
subannular palpiger maxillae bearing two setae on ventral surface and dorsally 
a tuft of four hairs. Basal and second joints of maxillary palp with a group 
of minute hairs at tip, second and distal joints each with a seta. Submentum 
(fig. 15, H, sm) between cardines, entirely membranous, anteriorly sharply set off 
by chitinous mentum, posteriorly by a suture separated from gula. Mentuni 
(fig. 15, C, H, mt) chitinized, elongate, subrectangular, bearing on its anterior half 
two pairs of setae- one smaller pair in front of the other large pair. Stipes 
labii much smaller than mentum and free, carrying two pairs of setae ; no sep- 
arately chitinized palpiger labii; labial palp (fig. 15, A, C, H, Ip) two-jointed, 
basal joint with a tuft of hairs at tip. Ligula- not developed, floor of buccal 
cavity soft skinned without any hypopharyngeal chitinization or paragnathal 
structures but both areas covered with minute asperities. Hypopharyngeal 
bracon (fig. 15, A, hyh) present, hypopharyngeal area (fig. 15, A, lipa) with 
two or three minute chitinized specks. 
Epipharynx (fig. 15, D) carrying a pair of chitinized epipharyngeal plates 
fused in the middle. In front of these there are a pair of minute setae, a group 
of six asperities, and two sensory spots. Along the distal margin of the epi- 
pharynx are five thickened setae on each side. 
Thorax: Dorsal areas undifferentiated. Prothoracic tergal region almost 
completely covered by tergal shield. Prothoracic tergal shield with seven 
pairs of small setae and one pair of large setae approximately arranged in 
three transverse rows. Each lateral margin outside tergal shield bearing six 
large and three small setae. The preepipleurum is small, the postepipleurum 
well developed. Hypopleurum with four setae and well developed prephypo- 
pleural chitinization. Presternal area marked by a pair of rounded, sub- 
triangular plates each with two setae. Sternum large, composed of preeusternum 
and eusternum, medianly covered with a large, heart-shaped, chitinous sternal 
plate. This plate is pointed anteriorly and has a large triangular indentation 
posteriorly, giving to it the heart-shaped appearance. The sternum carries 
several large setae. Poststernellum present and bearing a small, chitinous, 
subtriangular shield. 
