1966] 
Whitehead — Halocoryza 
221 
distinctly moniliform; scape with a single subapical dorsal seta; 
pedicel plurisetose; articles three to eleven pubescent. Mandibles 
moderately elongate and prominent, nearly straight along lateral 
margin, abruptly bent at tips; inner ventral margin of right mandible 
with a small tooth near middle; scrobe oblique. Terminal article of 
maxillary palpus strongly swollen basally, and with a basal fan of 
five or six fine, appressed bristles. Lacinia with apex acute, abruptly 
bent, and preceded on inner margin by a series of stout setae; outer 
margin of lacinia lacking setae. Penultimate article of labial palpus 
bisetose; terminal article with a basal fan of two fine, appressed 
bristles. Mentum not deeply emarginate at middle, with median 
tooth nearly or quite obsolete, and with epilobes reduced; mentum 
with a paramedian and a postero-lateral seta on each side, and with 
a pair of large pouch-like basal sensory pits. Submentum with one 
paramedian and one paralateral pair of setae. Gula broad, its nar- 
rowest part more than 0.4 width of mentum. 
Thorax. Pronotum usually slightly transverse, with both para- 
median and paralateral longitudinal sulci (not strongly developed in 
American species) ; median sulcus closely bordered by a pair of 
carinae, except at base (American species only) ; anterior and posterior 
pairs of marginal setae present, posterior pair recessed from margin 
and situated at or near base of paralateral sulcus. Prosternum 
strongly compressed between coxae, broadened and convex behind 
where lacking setigerous punctures. Metepisternum slender, elongate. 
Elytra. Lateral channel slightly narrowed at apex, shallow, lacking 
subapical pits; umbilicate series of punctures unbroken. Disc of elytra 
with at least six setae on intervals three, five, and seven; in addition, 
interval three has a long, whip-like seta at base. Intervals one to 
seven subequal, slightly convex; interval eight narrow, carinate 
apically, and parallel to elytral margin. Striae finely punctate in at 
least basal half. 
Hind wings fully developed, probably functional. 
Legs. Front tibiae with four well developed external teeth; apical 
and subapical spurs short, subequal; ventral-basal margin with three 
setae. Front and middle tarsi narrow and nearly glabrous in both 
sexes. Tarsi short (Ta/Ti less than 0.6). Paronychia subequal in 
length to tarsal claws. 
Abdomen. One pair of paramedian ambulatory setae on sterna 
three to six in both sexes; two pairs of equidistant apical marginal 
setae on sternum six. Second sternum with a pair of straight, short, 
oblique, widely separated, often inconspicuous paramedian carinae. 
Sterna four to six each with a well developed transverse suture. 
