DINOMIMETES EPITEDETJS 197 



lengths of the joints, sets the group somewhat apart, although this is not by 

 itself a character of generic value. 



The larvae live in the water in holes formed by certain species of crabs along 

 the coast. 



But a single species is known. 



DINOMIMETES EPITEDEUS Knab. 

 Deinocerites cancer Knab (In part), Psyche, xlll, 96, 1906. 

 Dinomimetes epitedeus Knab, Journ. N. Y. Ent. Soc, xv, 120, 1907. 

 Dinomimetes epitedeus Busck, Smiths. Misc. Colls., quart. Iss., HI, 75, 1908. 

 Dinomimetes epitedeus Theobald, Men. Cullc, v, 553, 1910. 



Obisinai. Description op Dinomimetes epitedeus: 



Female: Antennas, the tori small, globular, ochraceous, naked; second segment 

 extremely long; third segment about two-thirds as long, the following ones suc- 

 cessively shorter; the segments are densely ciliate and bear many scattered longer 

 setse; the second segment brown scaled. Clypeus elongate, conical, naked. Labial 

 palpi moderately short. Occiput clothed with narrow pale brownish recumbent 

 scales and a few scattered erect forked ones; along the posterior margin a dense 

 confused row of erect forked scales. Prothoraclc lobes prominent. Mesonotum 

 brown, the scale vestiture bronzy brown, having two submedian bare stripes and 

 with numerous coarse setse, mostly In subdorsal and lateral rows, longest and most 

 closely placed on the posterior portion. Scutellum distinctly trilobed, yellow- 

 brown, with three patches of brown scales and groups of long coarse setae on the 

 lobes. Metanotum rather narrow, elongate, with a group of setse near the apex. 

 Postscutellum clothed with dull brown scales and with many pale setae, somewhat 

 produced at the middle where there Is a double ridge of erect scales. Abdomen long 

 and slender, blunt at apex, the cerci small, slender and pointed. Vestiture of the 

 abdomen above dull brown, beneath dull yellowish bronze. Wings rather broad, the 

 scales of the veins brown and mostly narrow. Basal cross-vein slightly oblique, 

 more than its own length behind the anterior cross-vein. Knobs of the halteres 

 brown scaled. Legs brownish black, unicolorous. Claws small and simple. 



Length of body, about 5 mm.; of wing, 4 mm. 



Male: Very similar to the female; the antennae even longer; the third segment 

 hardly shorter than the second, the fourth but little shorter than the third; terminal 

 segments much shortened. Palpi slender, about equal to those of the female in 

 length. Abdomen subcylindrlcal, slightly expanded at the apex and with large very 

 stout claspers. All the claws simple, those of the front and middle legs very long, 

 those of the hind legs small. 



Length of body, 4 mm.; of wing, 4 mm. 



Locality. — ^Port Limon, Costa Rica (2 52, 1 1?. F. Knab). 



Type. — ^No. 10291, U. S. National Museum. 



This mosquito has a deceptive resemblance to Deinocerites cancer Theob. and like 

 it occurs in crab-holes. My remarks in Psyche, xiii, p. 95 on the occurrence of Deino- 

 cerites cancer at Port Limon apply to this species. At the time the article was 

 written the specimens in question were in the hands of Mr. Coquillett and were not 

 accessible for study. 

 Descbiption of Femau:, Male, and Labva of Dinomimetes efitedeus : 



Female. — Proboscis rather long, slightly thickened towards apex; labellse 

 rather large, conical ; setae rather long, dense, those on labeUae more prominently 

 outstanding; vestiture of brownish-black scales. Palpi short, about one-sixth 

 as long as proboscis, brown scaled, with outstanding setse. Antennae long, fili- 

 form, very slender, coarsely ciliate, with scattered large setae; second joint about 

 fourteen times as long as wide, succeeding one about ten times as long as wide, 

 the rest progressively shorter, penultimate one about four times as long as wide, 

 the last longer and pointed at tip ; tori subspherical with a cup-shaped, apical ex- 

 cavation, luteous brown, darker within; hairs of whorls sparse, short, black, 

 somewhat obscured by the coarse ciliation. Clypeus elliptical, prominent, 

 conical, dark brown, nude. Eyes broadly contiguous above, black. Occiput 

 clothed with narrow, curved, pale bronzy-brown scales, those along margin of 

 eyes denser, broader, and paler, numerous erect, forked, pale bronzy-brown ones 

 forming a dense mass ; a row of bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, clothed with black bristles. 



