MORGAN HEBARD 
429 
Measurements (in millimeters) 
d' 
Type. 
Length of 
body 
12.8 
Length of 
pronotum 
1.8 
Width of 
pronotum 
1.9 
Length of 
tegmen 
3.6 
Exposed 
length 
of wing 
1.6 
Length of 
forceps 
4.4 
Paratype. 
0 
10.2 
1.7 
1.9 
3.2 
1.3 
3.8 
¥ 
Allotype. 
11 
1.9 
2.1 
3.4 
1.7 
3.3 
The small series before us shows that the same type of variation 
in the male forceps is developed in P. tolteca and gulosa. The two 
largest males have strongly bowed forceps; these specimens are 
heavier than the other two males and have the disto-lateral 
angles of the fourth to sixth dorsal abdominal segments more 
sharply produced. The smallest male paratype is measured 
above. 
Ancistrogaster spinax Dohrn 
1862. Ancistrogaster spinax Dohrn, Stett. Ent. Zeit., xxiii, p. 229, pi. I, fig. 1. 
[No locality given.] 
Jalapa, Vera Cruz, Mexico, VIII and IX, (O. W. Barrett), 
1 cT, 5 9 , [A. N. S. P. and Hebard Cln.j. 
Teocelo, Vera Cruz, Mex., IX, (O. W. Barrett), 3 (T, 1 9, 
[A. N. S. P.]. 
These specimens have been previously recorded by Rehn, in 
part correctly, in part as A. luctuosus. 
Ancistrogaster uncinatus (Borelli) 
1915. Praos uncinatus Borelli, Boll. Mus. Zool. Anat. Comp. Univ. Torino, 
XXX, no. 699, p. 3. [Jalapa, Mexico.] 
Cordoba, Vera Cruz, Mexico, I, 27 to II, 10, 1908 (F. Knab), 
1 cT, 2 9,^1 [U. S. N. M.]. 
Presence or absence of wings or of an internal proximal tooth 
of the forceps is of no g( neric significance in the present sub- 
family. ^2 The present insect does not agree with the general 
structural development in the genus Praos, but shows a struc- 
tural development characteristic of species of the genus Ands- 
trogaster. 
The specimens before us all have fully developed wings, which 
organs are absent in the type of undnatus, which is smaller than 
2* This probably represents the material recorded by Burr as A. variegata, 
Can. Ent., xlvi, p. 276, (1914). 
52 See Hebard, Trans. Amer. Ent. Soc., xliii, p. 330, (1917). 
TRANS. AM. ENT. SOC., XI.III. 
