162 Dyar and Knob Some American Mosquitoes. 



Janthinosoma pygmaea Theobald. 

 Grabhamia pygmsea Theobald, Mon. Culic., iii, 245, 1903. 

 Culex nanus Coquillett, Can. Ent., xxxv, 256, 1903. 



We are much indebted to Dr. Grabham for cast skins of the larvae of 

 this species from Jamaica. It falls in our table ( Journ. N. Y. Ent. Soc., xiv, 

 181, 1906) with " pygmsea " (insularius D. & K.), but differs in detail. In the 

 true pygmsea there are four pecten teeth on the tube, which reach nearly to 

 the middle ; the teeth are variable in shape, but none have the long sec 

 ondary spine shown in our figure of insularius. The comb scales have the 

 central spine longer and curved at tip. Both the head hairs are single. 

 We have placed the types of nanus Coquillett from Florida and a large series 

 taken by Dr. Coffin in the Bahamas with pygmxa Theobald from Jamaica. 

 The larvae, however, of these mosquitoes are still unknown. 



GENUS AEDES MEIGEN. 

 Aedes euplocamus Dyar & Knab. 



Mr. Urich has sent us from Trinidad, two bred specimens, the larvae of 

 which agree with our euplocamus (Journ. N.Y. Ent. Soc., xiv, 199, 1906), de 

 scribed from Costa Rica. The identification of the adult of the Costa Rican 

 larvae as Irivittotus Coquillett was due to some confusion in the list returned 

 to us; most of the adults are, we find, placed under confirmatus in the col 

 lection. The name " confirmatus " has been used for a number of different 

 mosquitoes which are similar in having a large silvery patch on the ante 

 rior part of the thorax. We have given new names to the forms identified 

 as "confirmatus" from the United States (Aedes infirmatus Dyar & Knab, 

 Journ. N. Y. Ent. Soc., xiv, 197, 1906) and Jamaica (Aedes hemisurus 

 Dyar & Knab, Journ. N.Y. Ent. Soc., xiv., 199, 1906), and we now identify 

 the Trinidad species, named "confirmatus" by Mr. Theobald. 



It is, of course, possible that euplocamus is the same as confirmatus Lynch- 

 Arribalzaga, described from the Argentine, in which case Mr. Theobald's 

 identification should be restored. But we have as yet no proof of this. 

 Our euplocamus ranges from Costa Rica to Trinidad, as we now know, and 

 it will doubtless be found to extend into the tropics of Brazil ; but whether 

 the Argentine form is the same or not can only be told from more perfect 

 collections than we possess at present. 



Aedes serratus Theobald. 



Culex serratus Theobald, Mon. Culic., ii, 75, 1901. 



(?) Aedes meridionalis Dyar & Knab, Journ. N.Y. Ent. Soc., xiv, 195, 1896. 



Mr. F. W. Urich has sent us a specimen bred from a small pool in the 

 forest, Trinidad, which we think is the Culex serratus of Theobald, described 

 from Brazil and Trinidad. This species has been identified as occurring in 

 the United States, but we have found there to be two species, differing in 

 the larvae. We have renamed these, calling the Atlantic Coast one Aedes 

 atlanticus, the Gulf Coast one Aedes tormentor (Dyar & Knab, Journ. N. Y. 

 Ent. Soc., xiv, 191, 198, 1906). We assumed that neither was conspecific 

 with the Tropical American form, and this assumption is proven to be 



