154 
Psyche 
[June 
subequal in length, the pair on segment VIII much shorter; with no 
trace of a ventral series of scoli. Only abdominal spiracles I - 1 1 
visible in fossil, these located ventral^ directly beneath base of 
corresponding scolus (fig. 4, sp r, sp 2). Posterior margin of ninth 
sternum lacking short, stout, “digging” setae. 
Head and body covered with short black setae which are longer 
along the lateral margins of the head capsule, down the midline 
of the thorax and abdomen and, particularly, on the scoli ; longer 
setae narrowly lanceolate in shape. 
Type species, the following — 
Neadelphus protae new species 
Description. Setae along lateral margins of head only moderately 
elongated ; central mandibular tooth the largest of the three, distinctly 
nearer the anterior tooth than the posterior tooth, the posterior 
tooth the smallest; right antenna with 14 sub-segments distal to the 
scape, the left antenna with 12. 
Maximum width of head capsule immediately behind ocular areas 
— • 1 .40 mm. Body length from anterior - most clypeal margin to 
tip of IX abdominal segment — 3.6 mm. 
Holotype: No. 5848, in the Haren Collection of Baltic amber 
of the Museum of Comparative Zoology. The name for this insect 
is derived from the Greek Phaethon myth and translates literally as 
“Prota’s new brother”. 
The specimen, undoubtedly a first-instar larva, is contained in a 
nearly square block of pale-yellow amber with all important taxo- 
nomic details easily visible. The block has been mounted on an 
oblong piece of glass by some previous owner. This glass bears a 
label with the printed notation “Coll. Dr. Klebs”, to which some- 
one has added in india ink “N27-”. To this I have added the MCZ 
type number in blue ink and a new label with the designations 
''Neadelphus protae MacLeod” and “Holotype”. It seems certain 
that this was the larva mentioned by Klebs in 1910, and it is possible 
that the references to a larva from the early nineteenth century also 
pertain to this specimen. The route by which it finally reached 
the Haren Collection is not known. 
Generic diagnosis and discussion. The cordate posterior margins 
of the head capsule and large ocular tubercles with seven stemmata 
combined with the distinct fusion of the tibia and tarsus of the 
metathoracic leg show, without question, that this larva belongs to 
the Ascalaphidae. 
