STUDIES IN NEOTROPICAL MALLOPHAGA—-CARRIKER 185 
The scent glands in this species are unique. On segment IV the 
gland is small, round, with dark granulated center, and resembles 
that of Heptapsogaster temporalis, while it seems to lie between 
the dorsal and ventral integument, near the inner, posterior edge of 
the sclerite, which is no¢ incised to receive it- The gland on segment 
V is entirely different. It is more than half as wide as the pleurite 
and extends posteriorly slightly under segment VI. Apparently it 
consists of two parts, a large triangular body attached to the ventral 
surface of the pleurite and a second part attached to the median por- 
tion of the first part and extending nearly over to its inner edge, — 
where the pleurite is incised back to the large triangular body on its 
posterior portion. The visible portion of this second part of the gland 
is ovoid, unpigmented, and with a short median outlet, so that it 
resembles a woman’s breast. This is undoubtedly the sac where the 
substance secreted is stored, while the large, deeply pigmented portion 
is where it is secreted. The large triangular body has the sides (in 
part) raised, or folded over, which leads one to assume that it is 
attached to the ventral surface and not between the two integuments, 
and apparently does not have its entire surface attached to the pleurite. 
The genital armature is of the same general type as H. minutus, 
with small, weak endomeres, but with the paramers longer and with 
straight tips tapering to a point. 
MEASUREMENTS OF HEPTARTHROGASTER GRANDIS FROM TWO TINAMOU HOSTS 
From Tinamus 8. 
Reiruras From Tinamus t. tao 
Structure Female (type) Male 
(corrected) Female 
| —— 
Length | Width | Length | Width | Length | Width 
TB Yayo heb NA ATO ANE MA Nea cA 17 Shia |e MeN TAG | Belson A 1.78 
PLOTSEE ek EPMA CN MENG A A) Aa 0. 39 0. 46 
BRE as esi cael Oe He bee 0.53 ae 0.63 
TESOL AYO) oe. cig INN VAIS AANA 0. 206 0. 42 0.18 0. 41 0. 218 0. 456 
IMesothoraxs iis 2. ie su pane Oks 0. 16 0. 64 0. 16 0. 63 0. 16 0. 67 
TAM SECU 00) co ex aco wbe aie 1) Sa Ni gn A a 0. 227 0.58 0. 24 0. 586° 0. 24 0. 63 
PAID COTM OT i aS UNO Hb SRR 1. 06 0. 82 0. 82 0. 89 1. 07 0. 846 
PANTIECTATHLG odes eee Le NaN en ra AN na AN Jaya be ne A . 29 0. 072 0.25 | \ 0.045 
PAT AINOLS 3 so Uae ee NUNES ARI Ly atR LIN 0. 15 COPS (OYA sete aM ele EA ek He lo 
ndomeralipla tes. 20 oe Soe aay 0. 087 COSC: SH) PROS DEES boa 
Genus MEGAPEOSTUS Carriker 
MEGAPEOSTUS PARVIGENITALIS Carriker 
Megapeostus asymmetricus parvigenitalis CARRIKER, Lice of the tinamous, p. 143, 
pl. 23, fig. 2, 1986. (Host: Orypturellus atrocapillus, Bolivia.) 
Owing to the discovery of several new species belonging to this 
unusually interesting genus, additional information has come to hight 
