554 
Journal of Agricultural Research 
Vol. XXVI, No. II 
supported above hypopharyngeal bracon (hbr) by a chitinous plate from which it 
extends; elongate, subrectangular, somewhat rounded at base, projecting, strong, 
heavily chitinized; anteriorly tricuspidate; disk excavate with a slight swelling 
posteriorly. The hypopharyngeal bracon is a well-developed rod in the buccal mem¬ 
brane between the ventral mandibular articulations and the hypopharyngeal region; 
in the latter region the rod is heavily chitinized, near the former region slightly mem¬ 
branous. Epipharynx (PI. i, A, eph) forming the buccal surface of labrum, soft- 
skinned, with posterior, transverse, broad, sinuous, chitinous band that carries one 
pair of stublike, sharp teeth; on soft-skinned part anteriorly to these teeth a pair of 
tiny hooks; near anterior margin and below transverse chitinous band many scattered 
ring-shaped punctures. 
Legs well developed, surrounded at base by a large articulating area (PL 2, E, ar). 
Prothoracic legs considerably stronger than those of mesothorax and metathorax. 
Articulating area laterally with a few (three or four) short hairs. Coxae (PI. 2, D, F, 
cox) of first pair attached so closely together that they are nearly contiguous at base, 
nearly as long as wide, coriaceous; many fine scattered hairs on exterior and interior 
surfaces; trochanter (tr) about as long as coxa, anterior face (PI. 2, D) slightly coriaceous, 
posterior face (PI. 2, F) membranous, on inner side distally with two spinelike setae 
arising from a platelike callous wart, also a few thin hairs; femur ( fe ) as long and about 
as wide as coxa, anterior face coriaceous, usually armed with six or seven large spine¬ 
like setae and two to three thinner setae, also with many scattered hairs; tibia (ti) 
nearly as long as femur and about half as thick, with anterior face coriaceous, distally 
usually armed with five or six spinelike setae and two to three more slender setae, also 
many scattered hairs; tarsus (ta) about as long as tibia, falcate, strong but rather slender, 
surface facing backwards, excavate, basal portion enlarged, gradually narrowing to 
apex; on posterior tarsal side with round, rather soft-skinned region which bears 
distally, at base of excavation on either side, a strong chitinous seta. Second (PI. 2, 
D, F) and third pairs of legs inserted farther apart, much more slender and anterior 
faces less coriaceous than die first pair; the arrangement of setae and proportion of the 
articles vary somewhat from those of the first pair, but the two pairs are themselves 
alike. Coxa (cox) about twice as long as wide, with many scattered hairs except on 
exterior surface; trochanter (tr) about half as long and half as wide as coxa, distally with 
two spinelike setae, also with a few other thin hairs; femur (fe) os wide as, but not quite 
twice as long as trochanter, armed, usually, with five chitinous spines, posterior face 
apically with two spinelike setae, exterior surface with many fine scattered hairs; 
tibia (ti) about as long as but somewhat narrower than trochanter, usually armed with 
four chitinous setae, posterior face with two spinelike setae, exterior surface with very 
few scattered hairs; tarsus (ta) a little shorter than tibia, slender, surface facing back¬ 
wards excavate, basal portion similar to tarsus of prothoracic leg. 
Ventral intersegmental region between head and prothorax joined by slightly 
chitinous prestemal area (PI. 2, E> y) with two minute setae each side and a slightly 
chitinized subconical area (pen) with two minute setae which partly separate the pre¬ 
stemal area and form the preeustemal subdivision of the eustemum; this joint region 
much wider than gula. Ventral intersegmental region between prothorax and meso¬ 
thorax, and between mesothorax and metathorax, distinct, membranous, composed of 
poststemellar, preepipleural, and prestemal areas. 
Prothoracic eustemum (PI. 2, E, eu) large, trapezoidal; the prehypopleural chitini- 
zations (h x and hf), and especially the prehypopleural chitinization h v large and strong, 
internally adjacent to ventral intersegmental region; sternellar region (stl) behind 
front legs, almost fused with eustemum, forming together a clepsydra-shaped region; 
poststemellum (z) transverse, somewhat spindle-shaped; prothoracic tergal shield 
(te) transverse, sub quadrate, with anterior and posterior margins as mentioned above; 
right back of anterior margin as also near posterior margin a transverse series of setae, 
usually composed of three setae anteriorly and four posteriorly on each side; lateral 
margin with a few thin setae, grouped mostly anteriorly and posteriorly. 
Mesothorax and metathorax with large eustemal region; no separation of a pre¬ 
eustemal subdivision indicated, as in other forms such as Merinus laevis Oliv. 7 Pre¬ 
stemal areas (PI. 2, E, y) distinct, sub triangular, anteriorly slightly chitinized, bear¬ 
ing two setae adjacent to poststemellum (z) of the preceding segment which has a few 
short hairs; prehypopleural chitinization (h L ) well developed, bearing many small 
setae; posthypopleural chitinization (h 2 ) very small, not to be confused with adjacent 
oval chitinizations in articulating skin of leg; coxae rather distant; poststemellum of 
metathorax not present; preepipleurum of mesothorax and metathorax (e Y ) subtriangu- 
7 Although no separation of a preeustemal region is indicated, the areas correspond to those in Merinus 
laevis in which such a division is indicated. In this connection it may be pointed out that no well devel¬ 
oped prestemum is present in Merinus laevis as is in this form. 
