STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 189 
at their tips, while abdominal segment VII differs both in structure 
and chaetotaxy (see fig.). The single female of secwndus I have seen 
has this Segment as shown in the figure, but I am of the opinion that 
this specimen is slightly immature and that perhaps the aly adult 
will show differences in structure. 
The species is represented in the collection by four males and two 
females, two pairs from one bird and two males from another. 
Miss Clay (1987, p. 151) had a single female of this species, taken 
trom a skin of the type host, which she placed, without remark, under 
M. secundus, the types of which were taken on Crypturellus cinna- 
MOMEUS MEXICANUS. 
This is the third species of Mallophaga taken on the Colombian host 
Orypturellus idoneus, which is very closely related to the parasites 
from C. b. boucardi of Mexico and not to C. c. cennamomeus or C. cin- 
namomeus sallaet. This cumulative evidence seems to show that @. 
idoneus of Colombia is conspecific with C. boucardi and not with a 
cinnamomeus, as given by Peters. 
MEASUREMENTS OF MEGAPEOSTUS MULTIPLEX IDONEUS 
Male Female 
Structure iq aE RIS AEE TL a 
Length Width Length | Width. 
TBXQYG ESSA IRR LEN INE 0 SS rape ee Se DL ane es 25 OO Heese tele 1. 95 
JUNO) aRSYLIN a APE SS TR SS 2 a ad a ay ee ORS8ih| 5 S82 ERE des 6. 47 
TEA bE PIES sea eee ae se SURO OL ee he Se A 0. 51 0. 79 0. 52 0. 80 
OCCIPUT eae eee rate EES 2 Las eh a Qs447 | SEO eye. 6 0. 44 
BTOCNOLAKUNG EE MEE RIA SU RRES AEE CLC Bd Rie 0. 22 0. 45 0. 215 0:41 
IVIESO GOTO Reet eae ci eM act ah LS 0.18 0. 70 0. 174 0. 67 
Vie GEG OTe Keep ee OIE me te RE ce a MMs Re veh 28 0. 18 0. 65 0.18 0. 63 
PANO Terie Rare e sie or tin) MALIA OC. OTH Wiehe diag 1. 22 0. 81 WIZE! 0178 
PACT GC TLTV LC He Ue ee aN RUA AMD atte I ae ig NL APO 2 0. 30 0.10 0. 23 0. 04 
VEEN UF 0} Ee ae SENS A a SU ae eS 0. 53 ORS ZR etealens Dew 
Moneiparamer suwouees seen lanai EE SC 0. 43 aus 
Shorts paramere! hs AUeMeN Aye Seine als eal LALO Med 0. 37 aR or OO a 
Hndomeraliplatex anne san sol cae eee Se 0. 30 OSU RRS IO LAE 
MEGAPEOSTUS SECUNDUS Clay 
Figure 22, b-e 
Megapeostus multiplen secundus Ciay, Proc. Zool. Soc. London, ser. B, 1937, p. 
150, figs: 9b, 10b. (Host: Crypturellus cinnamomeus mexicanus, Mexico.) 
Two males and one female were taken on Crypturellus cinnamo- 
meus sallaei, collected by the author at Tres Zapotes, Veracruz, Mexico, 
on March 27, 1940. : 
Male: The head is very similar to that of multiplex in every partic- 
ular except that the length from the occiput to the front is slightly 
less, and from the front to the tips of the temples slightly more, while 
the temples are narrower. Also, the metathorax is without hooks on 
