Dec, 1906] Dyar and Knab: Larvae of Culicid^. 225 



longest, the rest successively shorter ; a single tuft on the side of the 

 tube. Comb of sixteen bar-like spines in a straight row. Anal seg- 

 ment with complete chitinous ring, the gills very long, tapered. The 

 body is without spicules. 



Mr. Busck collected the specimens in a rather large pool in a palm 

 swamp far from civilization at Arima, Trinidad He says : ' ' the larvae 

 are weakly looking small fellows, which lie on their backs with jaws 

 upward and open. They feed on very minute animal life (Crusta- 

 cean) which abounds in these pools ; observed this habit both in nature 

 and in captivity and bred so few (five specimens) because the rest 

 died when the Crustaceans gave out.' ' 



The adults were named " Melanoconion atratus Theob." by Mr. 

 Coquillett. We have it for Mr. A. N. Caudell, our friend and 

 co-worker. 



Mochlostyrax cubensis, new species. Fig. 64. 



The specimens are badly damaged, but enough is left to give the 

 specific characters. The tube is of the same shape as in caudelli and 

 had apparently similar hair tufts. Pecten very long, not reaching 

 half way along the tube. Lateral comb of the eighth segment of 

 eight bars, stout, well separated, the upper ones smaller. 



We have the specimens from Havana, Cuba, from Mr. John R. Tay- 

 lor as "Melanoconion atratus Theob." the determination made by 

 Mr. Coquillett, we believe. 



Subfamily SABETHINiE. 

 Table 0} genera . 



1. No lateral comb on the eighth segment Joblotia 



Lateral comb present on the eighth segment 2 



2. Air tube spicular; maxillae heavily armed, raptorial 3 



Air tube smooth; maxillae without heavy armature, not raptorial Wyeomyia 



3 Head normal, the mouth parts not visible from above Sabethoides 



Mandibles and maxilla- visible from above Lesticocampa 



Genus JOBLOTIA Blanchard. 



Trichoprosopon Theobald (not Trichoprosopus Macquart), Mon. Culic, ii, 283, 



1901. 

 Joblotia Blanchard, Cont. rent. heb. Soc. Biol., liii, 1045, 1901. 



Joblotia niveipes Theobald. Fig. 65. 



Trichoprosopon niveipes Theobald, Mon. Culic, ii, 285, 1901. 



