PSOROPHORA INSULARIUS 605 



Genitalia (plate 23, fig. 159) : Side-pieces more than twice as long as wide, 

 conieally tapered, apical lobe slightly developed, forming a small angulation, 

 basal lobe absent ; clasp-filament stout, strongly swollen medially, with a few 

 minute setae, a short stout articulated terminal spine. Harpes flat, concave, 

 inner margin thickened and revolute, divided at tip, forming three teeth directed 

 outAvardly. Harpagones with a slender ligulate base and broadly triangular tip 

 bearing four stout seise on elevated bases. Unci contiguous, forming a slender 

 cone with divided tip. 



Larva, Stage IV (plate 116, fig. 398). Head rounded, transverse, widest and 

 bulging in region of eyes; antennae rather small and slender, scarcely spinose, 

 the tuft moderate, before middle, two of the apical spines well removed from tip ; 

 upper pair of dorsal head-hairs small, in fours, lower pair longer, double ; ante- 

 antennal tufts in fives. Lateral comb of eighth segment of six separate scales, 

 fringed with spines, the middle one longest. Air-tube inflated, fusiform ; pecten 

 of two subbasal teeth ; hair-tuft obsolete ; terminal hooks small. Anal segment 

 longer than wide, the chitinous ring about as long as wide, weakly chitinized ; 

 dorsal hairs a long hair and tuft on each side; ventral brush well developed, 

 running along ventral line nearly to base. Anal gills very short, rounded, equal. 



Dr. Grabham bred the larvae from seaside pools in coral rock. We assume 

 from the abortive anal gills of the larvae that the water in these pools was saline. 

 These pools were probably of a temporary character, for the species of Psoro- 

 pJiora are not continuous breeders and we believe the present species is no 

 exception. 



Island of Jamaica, West Indies. 



Port Antonio, November 15, 1906 (M. Grabham) . 



PSOROPHORA INSULARIUS (Dyar & Knab). 



Qrabhamia pygmceus Dyar (not Theobald), Proc. Ent. Soc. Wash., viii, 16, 1906. 

 Ora})'hamia pygmceus Coquillett (in part, not Theobald), U. S. Dept. Agric, Bur. Ent., 



Tech. Ser. 11, 21, 1906. 

 Janthinosoma pygmcea Dyar & Knab (not Grabharnia pygmaea Theobald), Journ. 



N. Y. Ent. Soc, xiv, 182, 1906. 

 Janthinosoma insularius Dyar & Knab, Proc. Biol. Soc. Wash., xix, 135, 1906. 

 Janthinosoma insularius Dyar & Knab, Proc. Biol. Soc. Wash., xix, 161, 1906. 

 Janthinosoma insularius Theobald, Mon. Culic, v, 604, 1910. 



Obiginal Description of Janthinosoma insularius : 



Hind legs without raised scales; tarsi with pale bands; first hind tarsal joint with- 

 out a white ring; wings with whitish and dark scales intermixed; legs pale, the 

 yellowish scales predominating. Else as in J. pygmaeus Theobald. 



8 specimens, Santo Domingo, W. I. (A. Busck). 



Type. C&t. No. 9975, U. S. Nat. Mus. 



Desceiption of Female, Male, and Larva of Psorophora insularius : 



Female. Proboscis moderate, cylindrical, uniform, labellae conieally tapered ; 

 vestiture of black scales with white ones intermixed, a very broad ring of yel- 

 lowish-white ones at middle, its edges ill defined ; setae small, black, curved, those 

 on the labellse more prominently outstanding. Palpi short, stout, about one- 

 fourth as long as proboscis, black scaled, with a few white scales basally ; setae 

 rather long, black. Antennae rather short and stout, the joints subequal, rugose, 

 pilose, black ; second joint thickened and a little longer than the others, luteous, 

 the next two shortened, brown; tori subspherical, with a cup-shaped apical 

 excavation, brown, with a patch of broad white scales on inner side; hairs of 

 whorls very short, sparse, black. Clypeus elliptical, convex, blackish, nude. 

 Eyes black. Occiput narrow, convex, dark brown, clothed with narrow, curved, 

 shining white scales, which about half cover the surface, and many short erect 

 forked brown ones ; at the sides a small patch of flat, broad black scales sur- 



