STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 121 
female has the head and all the thoracic segments actually narrower 
than in the male, although all are slightly longer. The abdomen is 
both longer and wider in the female. 
MEASUREMENTS OF STRONGYLOCOTES PELLUCIDIFRONS 
Male Female 
Structure = ES 
Length Width Length Width 
MES OC yp | ea EE CS Tl a EEN Pea Li Be Brae 3. 56 
TRUCE G baht Be aan aU A CELA OT Ne ta 1. 00 0. 93 1.00 0. 89 
TE TROIS} OGY eee, C8k AA eae RNAP i ARES Re feat 0. 37 0. 70 0. 39 0. 63 
IVICSOCROT ARE ene ae UALR OCIA TOA VN ARCO ral LE Pl 0. 63 1. 05 0. 65 1. 02 
WIS tALHOTACIC A DLO Me sem aes eee rata aise eu 0. 28 0. 68 0. 32 0. 67 
PAUL CLO TING Tree ye eeu ren arenas yl UPBNEINUE nc ees an Stan MEI AUNS ane St SY Ec 1. 67. 1.19 1.90 1. 39 
ANGORA OG AERTS ae OR SU Np NA i i We AD LE ge 0. 58 0. 087 0. 57 0. 087 
STRONGYLOCOTES LIPOGONUS LIPOGONUS (Nitzsch) 
Goniodes lipogonus NiTzScH, in Giebel, Zeitschr. fiir Ges. Naturw., vol. 28, p. 388, 
1866. (Host: Rhynchotus r. rufescens.) 
A reexamination of the material treated in “The Lice of the Tina- 
mous,” 1936, together with additional material from Rhynchotus ru- 
fescens maculicollis, shows that the parasites from the two host sub- 
species are not the same. The specimens from R. 7. maculicollis 
differ from true lipogonus in the size and proportions of the head, the 
male genitalia (see table of measurements), and in the chaetotaxy 
of the abdomen. It seems best, therefore, to give the insects from 
Rf. r. maculicollis subspecific rank (since I consider 2. 7. rufescens to 
be the host of S. 1. lipogonus), and they may be called: 
STRONGYLOCOTES LIPOGONUS ALTICOLA, new subspecies 
Types.——Male and female, adults, from Ahynchotus rufescens 
maculicollis, collected by the author at Sandillani, Dept. La Paz, Bo- 
livia, December 11, 1934; in collection of author. 
Diagnosis —tIn S. 1. alticola the head of the male is smaller in all 
proportions than that of true lipogonus, although the frons is wider 
In proportion to the width at the trabeculae and temples. In the gen- 
ital armature we have the paramers of alticola very much shorter and 
narrower, as well as the endomeral plate, although the latter is consid- 
erably wider in proportion to its length. In the female there are 
10 strong hairs on each side of the posterior margin of the last abdom- 
inal segment, while in Zépogonus there are but 7 hairs; in the lateral 
angles of segments IV and V there are one weak and two strong hairs 
in alticola, and but one strong and one weak hair in ipogonus, while 
on segment VI there are one weak and three strong hairs in alticola 
