STUDIES IN NEOTROPICAL MALLOPHAGA—CARRIKER 191 
| Genus DISCOCORPUS Carriker 
DISCOCORPUS CEPHALOSUS FURCULUS, new subspecies 
Figure 23, d-f 
Types—Male and female, adults, from Crypturellus 6. boucardi, 
collected by the author on Cerro Tuxtla, Veracruz, Mexico, March 28, 
1940; in collection of author. 
This form presents a combination of the characters of both cephalosus 
and microgenitalis, the head being somewhat similar in shape to the 
latter, yet different from either, while the genital armature is of the 
same type as the former. 
In the male the body length, as well as the length and breadth of the 
head, is greater than in cephalosus,; the prothorax is shorter and 
wider; the mesothorax is both longer and wider, while the metathorax 
is shorter and wider; the abdomen is also longer and wider and the 
antennae longer. 
Both paramers and basal plate are longer, but scarcely wider. 
In the female of fwrculus the prothorax is shorter, the mesothorax 
and abdomen the same length, while all the other measurements are 
greater. The last abdominal segment is considerably wider but about 
the same length, while the chaetotaxy is very similar. 
The genital armature is decidedly the type of cephalosus, both as to 
size and structure of basal plate, paramers, and endomeral plate, 
differing only in their proportions (see corrected figure of cephalosus 
and of furculus). However, the seminal duct is quite different, that 
of cephalosus being a simple tube, with two complete convolutions, 
and with the distal opening at the end of the endomeral plate. In 
furculus the duct is without convolutions, although there is a thicken- 
ing of the tube in the middle portion, which may or may not be a sort 
MEASUREMENTS OF DISCOCORPUS CEPHALOSUS 
cephalosus Jurculus 
Structure Male Female Male Female 
Length) Width | Length | Width | Length} Width | Length} Width 
TE OY 0 bh AA NTA NUR ARR aS OS 87h eaves DOA Ui icabrus ices PROD y i lees seh a 1.10 
TE x20 LANG gre aa ITU SIE Oe Ae 0. 26 0. 47 0. 29 0.50 } 0.31 0. 55 0. 32 0. 55 
TPTOEROTAX ewe MO Wi ROT Uae NUL 0.087 | 0.29 0. 092 0.30 | 0.07 0.326 | 0.087 0. 347 
IVICSOENOTAR Se oes EI a A 0.087 | 0.466] 0.108 0.46 | 0.10 0. 52 0. 108 0. 52 
Metathorax a ulncuee yin va 0.13 | 0.42 | 0.13 0.4t | 0.12 | 0.50 | 0.15 |. 0.53 
VAST OTMON ss Ue lal days WME sal Ne 0. 55 0. 65 0. 65 0.67 | 0.57 0. 72 0. 66 0.75 
PA CENTS sess NON VARMA ay Cama euha a ONTS pee ee ONT Gin Seana ONT Sia eee 0. 195 
TEXEN ge 0 8) pea pe LIE Lae OR O87 ONO Tint Mee te aseaa | BOM Aaa OXO9 7a ONO72i |e amet 
