STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 167 
Genus RHYNCOTHURA Carriker 
RHYNCOTHURA MINUTA BOLIVIANA, new subspecies 
FIGURES 17, g; 18, a, b 
Types.—Male and female, adults, from Nothura maculosa oruro, 
collected by the author at Callipampa, Bolivia, May 31, 1936; in col- 
lection of author. 
Diagnosis —The male differs from R. minuta minuta in shape of 
head, shape and proportion of thoracic segments, shape of abdomen, 
and character of abdominal sclerites, as well as in the shape and 
proportion of the genital armature. 
The preantennal area is considerably longer, with frons rounded 
instead of flatly convex and with margin not crenulated; the sides of 
the prothorax are straight to the posterior angles, not convex, while 
both mesothorax and metathorax are of different shape. 
The abdomen is slenderer, less rounded, but with chaetotaxy about 
the same, except that most of the hairs are longer. There is no hyaline 
space between the tergites and pleurites, these sclerites being closely 
fused, with the suture very faintly visible, while the tergal plates are 
broken medially and sternal plates continuous. (The first joint of the 
antennae of the male, as shown in the figure, is the inside face; the 
opposite face is much narrower, 0.06 instead of 0.078.) 
MEASUREMENTS OF RHYNCOTHURA MINUTA BOLIVIANA 
Male Female 
Structure — TST eee | VAM eS. ea 
Length Width Length Width 
1B Ya L0 fice ile aN Oe a a UTD DS bet Ria We EE 1. 36 
POTTS Cee ove reicile CALI Rena UIA TERE RRC MN IN COR eA ANE A EA Pa le CO ESO) let | Una ee oa 0. 33 
Head tem ples says UCU ar nee e  ee BR RRA) BT LIA 0. 39 0. 415 0. 41 0. 436 
COX a DA Bes NE SO aL MAL RRL DEN SL EU ORG A A O83875 52 ee a 0. 40 
TO CHOTS Ket UU Ne A) Me Aca ON ea OS A SR NTI 0. 09 0. 217 0. 108 0. 23 
MVE CSOT OTE xian ce SaLNe ra VOR Rh SeeN IU AAU en ULE 0. 14 0. 35 0.15 0. 37 
VEC TA THOTAK Oe oe aes llnare Nal Oe OPM p aE CC RAUL MON ide 0. 13 0. 31 0. 11 0. 33 
PANDO MEN Oe i ANAL ORL Aaetecen ea UN LR EN 0. 67 0. 52 0. 80 0. 52 
PARI EC TINA thes ear aerL AVG cL AM Meee LAU URN cL 0. 195 0.05 0.16 0. 033 
IPATAINErS ee ee rn NTN AN AUDA NLR UE 0. 09 OF0G iy) a Be 
Hndomeral platen wate deine cam PUawe a MIU NL pM 0. 087 OL O88) ee ernbi ices 
The female is very similar to the male, the head, except for the 
dimorphic antennae, being similar as to markings and shape, although 
shghtly longer, but of same width at temples. The abdomen is elon- 
gated, with segments VI and VII wide, the latter being flatly rounded 
posteriorly. The pleural plates are narrower and have inner margin 
clearly outlined. There seems to be a clear space between the sternal 
plates and the pleurites, while the latter are continuous with the 
