192 
R. TRAUB 
Thorax. Pronotum with one row of about six large bristles ; pronotal comb with a total of about 18 spines. 
Mesonotum (fig. 16, MSN ) with two rows of bristles ; its flange with three pseudosetae ( PS.S ) per side. 
Mesepisternum ( MPS ) with about two or three bristles, of which one is usually at dorsocaudal angle and 
another in ventrocaudal region. Mesepimere ( MPM ) with about five bristles, arranged 3-2. Metanotum 
(. MTN ) with two rows of bristles. Lateral metanotal area ( L.M ) broader than long, with two bristles; of 
these, one subdorsal and one subventral. Metepisternum (MTS) with a long subdorsal bristle. 
Squamulum undeveloped. Pleural arch (PL. A) narrow but distinct. Metepimere (MTM) with about 
9 to 11 bristles, typically arranged 4-4-1 or 5-4-1. 
Legs. Metacoxa with a short patch of about eight to 10 mesal spiniforms at anterior margin below midpoint- 
Profemur usually with one nonmarginal lateral bristle. Relatively longest bristle of tarsus is on first 
segment of protarsus ; this reaches slightly beyond apex of second tarsal segment. No other bristles of any 
tarsal segment reach beyond apex of following segment. Posteromarginal bristles of mesotarsus I and II 
particularly enlarged, much longer and stouter than anteromarginals. The same is true for protarsus I. 
Fifth segment of fore and mid tarsi with four pairs of lateral plantar bristles; in hind tarsus usually with 
three, at times with four pairs of lateral plantar bristles. Measurements (in microns) of tibiae and segments 
of tarsi (petiolate base deleted) as follows : 
Leg Tibia Tarsal Segments 
I. 
II. 
III. 
IV. 
V. 
Pro- 
63 . 
.. 33 . 
.. 33 . 
.. 24 .. 
21 
• 45 
Meso- ... 
106 
71 
.. 49 . 
•- 33 • 
.. 24 .. 
•• 47 
Meta- . . . 
120 
.. 114 . 
.. 75 . 
.. 47 .. 
28 
.. 54 
Abdomen. Terga with apical spinelets arranged as follows (total number): 2-2-2-2-2. On terga three to 
five the teeth are virtually dorsomarginal, but usually subdorsal in terga one and two. Terga one and 
two in male usually with the first row of bristles fairly well developed, consisting of two or three bristles; 
this row much reduced in remaining unmodified terga, usually represented by one or no bristle, that dorsal. 
Morphological second row of bristles (the only one extant on most terga) extending slightly ventrad of 
subglobose spiracle. In female anterior row usually consisting of three or four bristles per side on terga 
one to four; on remainder, of two or three bristles. Second abdominal sterna in each sex with a ventro- 
marginal bristle per side. Typical sterna in male with about two fairly large subventral bristles per side, 
preceded by one to four small ventromarginals ; typical sterna in female with three or four bristles per side, 
preceded by two to five smaller subventrals or ventromarginals ; at times an additional small bristle above 
row of long ones. In male with three antesensiliary bristles (fig. 15, A.B ), of which middle one is by 
far the longest, about two or two and one-half times length of uppermost and three times length of 
lowermost; female with three antesensiliary bristles (fig. 19, A.B), of which ventralmost is about three- 
fourths length of middle one and slightly longer than uppermost. Base of A.B. in male dorsomarginal; 
in female, slightly removed from dorsal margin. 
Modified Abdominal Segments, Male. Eighth tergum (fig. 15, 8 T) reduced to a narrow sclerite; its dorsal 
margin not extending caudad beyond base of sensilium, ventral margin extending to middle of proximal 
arm of ninth sternum; tergum about three times as broad as long. Eighth sternum ( 8 S) very broad, 
shaped like an equilateral triangle but with corners subrounded; extending dorsad to about level of seventh 
spiracle ( 7 SPC). Eighth sternum with about eight or nine fairly stout bristles on caudal half, that near 
dorsocaudal angle the longest; most median or subventral. Immovable process of clasper divided into 
two lobes (Pi, P2 and fig. 18). Pi distally subacute, with a long apical bristle, below this two submarginal 
bristles bordering the sinus between the two lobes; with two or three dorsomarginal bristles preceding 
the stout apical one. Dorsal margin fairly well sclerotized, appearing incrassate. P2 separated from Pi 
by a U-shaped sinus that is well dilated apically so that sinus is slightly broader than deep. Dorsal margin 
of P2 broadly and evenly rounded ; with four thin bristles ; caudal margin slightly convex and with five 
distal bristles, the row imperceptibly merging with the dorsal one. P2 three-fifths as broad as long, as 
measured from midpoint of suture serving as caudal margin of Pi. Digitoid or movable finger (F) about 
three times as long as broad at maximum; anterior margin relatively straight; posterior margin evenly 
convex; apex subacute, not extending perceptibly above level of P2; caudal margin with three smallish 
bristles on apical two-thirds, the uppermost subapical, the second at apical third and the ventralmost 
slightly below midpoint; between these are interspersed very small thin marginal bristles; with a small 
subapical bristle inserted on anterior margin, which is relatively evenly sclerotized. Manubrium (MB) 
long and narrow, somewhat curved, apical portion fairly straight. Ninth sternum with proximal arm 
(P.A. 9 ) fairly weakly sclerotized, apically expanded and subrounded. Distal arm of ninth sternum 
(D.A .9 and fig. 20) slightly longer than posterior arm, narrowing at apical fourth; ventral margin above 
this point with two or three bristles; subovate apex with two bristles, that at vertex slightly smaller and 
stouter but nevertheless not subspiniform; with one or two very small subapical bristles and an additional 
one or two such bristles along distal portion of dorsal margin. Aedeagal apodeme (AE.A) broad in the 
main, portion anterior to base of apodemal strut four times as long as broad at maximum; narrowing at 
level of P.A .9 to produce a relatively broad neck (fig. 14, iV.); apodeme acutely produced at anterior end of 
aedeagus, resulting in a short apical appendage (AP.A). Wall of aedeagal pouch relatively well sclerotized, 
as is characteristic of genus, its base (B.P.W) almost straight, its ventral margin (P.W) more lightly 
sclerotized, somewhat sinuate. Median dorsal lobe (M.D.L) lightly sclerotized, shallowly concave 
STUD. INST. MED. RES. 
