580 FAMILY XIX. — REDUVIID^E. 



VIII. Doldina Stal, 1859b, 366. 



Elongate, linear species having the front lobe of head only 

 half the length of hind one; ocelli small, not elevated on a 

 tubercle ; joint 1 of beak slightly longer than 2 ; pronotum sub- 

 cylindrical, the transverse constriction very feeble, its front 

 lobe but slightly narrower than hind one, the front margin con- 

 cave, humeral angles, in our species, each armed with a very 

 short erect spine; scutellum elongate-triangular, its basal half 

 with an obtuse V-shaped ridge ; elytra reaching middle of last 

 dorsal; connexivum not exposed; front femora feebly swollen, 

 a little shorter than hind ones, the latter reaching base of 

 sixth dorsal ; front tibiae with a short compressed preapical 

 tooth ; abdomen with apical angles of ventrals 1 and 2 slightly 

 prolonged as a short spine. Genital plate of male scoop-shaped, 

 its apex rounded. 



Seven species have been described, three from Brazil by 

 Stal, one from Antigua by Barber, one from Cuba by Fracker 

 and Bruner and two from our territory by Bergroth. I can 

 find no stable characters separating Bergroth's species and so 

 place them both under one name. 



555 (794). Doldina 7 " interjungens Bergroth, 1913a, 263. 



Elongate, very slender. Dull straw-yellow, rather thickly clothed 

 with a short, fine silky white pubescence; sides of head and scutellum 

 usually tinged with fuscous ; abdomen often fuscous, both above and 

 beneath, its ventral surface with a pale margin, sometimes wholly pale; 

 head and femora rarely suffused with reddish. Joint 1 of antennae reach- 

 ing apex of scutellum, 2 shortest, less than one-fourth the length of 1, 

 3 two-thirds the length of 1, twice as long as 4. Pronotum nearly twice 

 as long as wide at base, its hind lobe finely and densely rugose-punctate 

 and with three wide vague shallow grooves, the humeral angles each 

 armed above with a short suberect tubercle or spine. Other characters 

 as under generic heading. Length, 17 — 19 mm. 



Dunedin, Sarasota and R. P. Park, Fla., Nov. 22— April 12. 

 Frequent on tall dead grasses along the borders of ponds, lakes 

 and the sloughs of the everglades. The spine of the humeral 

 angles of pronotum varies in length from a mere tubercle to a 

 very distinct acute projection. It is usually erect, but some- 

 times projects strongly outward. The abdomen varies much 



70 Bergroth has shown (1913a, 263) that the generic names Doldina. Stal and 

 Hygromystes Stal are synonymous, the former having priority by a year. The sub- 

 genus Ceballum , proposed by Fracker and Bruner (1924, 172), is also, in my opinion, 

 a synonym of Doldina and, iudging from the description, their Cuban species Hy- 

 gromystes armata is very doubtfully distinct from D. interjungens Berg. 



