Februaiy, '14] FELT: ACAROLETES PSEUDOCOCCI 149 



unable to refer it to any described species, and the form is therefore 

 characterized as new. 



Male. Length 1.5 mm. ^Vntenna; probably as long as the body, sparsely haired 

 dark brown; 14 segments, the fifth with the stems, each with a length about twice the 

 diameter ; terminal segment missing. Palpi ; first and second segments short, irregular, 

 the third with a length about four times its diameter, the fourth \ longer than the 

 third, the distal two thirds dilated. Mesonotum yellowish brown. Scutellum, 

 post-scutellimi and abdomen fuscous yellowish. Halteres yellowish basally, fus- 

 cous apically. Coxae and femora basally yellowish, the distal portion of femora, 

 tibia? and presumably tarsi, fuscous straw. Glenitalia; basal clasp segment rather 

 long, moderately stout and internally at the basal angle with a long, narrowly triangu- 

 lar lobe, the latter slightly curved apically; terminal clasp segment moderately long, 

 slender; dorsal plate short, triangular, emarginate, the lobes broadly rounded; ventral 

 plate short, broad, narrowly and irregularly rounded; style short, tapering to a nar- 

 rowly rounded apex. 



Female. Length 1.5 mm. Antennae extending to the third abdominal segment, 

 sparsely haired, fuscous yellowish; 14 segments, the fifth with a stem | the length of 

 the cylindric basal enlargement, which latter has a length 2^ times its diameter; 

 terminal segment slightly produced, with a short, stout process apically. Palpi 

 practically as in the male, except that the third and fourth segments appear to be 

 nearly equal. Mesonotum purplish brown. Scutellum and post-scutellum yellowish 

 brown; abdomen sparsely haired, deep red. Halteres j^ellowish basally, fuscous 

 apically. Coxae and femora basally yellowish, distal portion of femora, tibial and 

 presumably tarsi, fuscous straw. Claws stout, strongly curved, bidentate, the pul- 

 villi as long as the claws. Ovipositor short, obtuse, the terminal lobes narrowly oval 

 and sparsely .setose. Tj'pe Cecid a2469. 



This species presents a close general resemblance, both in antennal 

 and alar characters, to Arthrocnodax from which it is most easily- 

 separated by the bidentate claws. The internal lobe of the basal clasp 

 segment suggests a relationship to Coquillettomyia Felt, though there 

 is no marked chitinization of the ventral plate or harpes so pronounced 

 in this genus. 



AMMONIA GAS AS A FUMIGANT 



By D. E. Fink, Assistant, Truck Crop and Stored Product Insect Investigations, Bureau 



of Entomoloqy. 



Ammonia has never been the subject of experiment as a fumigant 

 so far as the writer can learn, at least in recent years. It first suggested 

 possibilities in this direction when through accident the fumes were 

 inhaled. Its properties as a disinfector add to its value, particularly 

 when used on food products. 



While the sources of ammonia are many, at the time the experiments 

 were begun only one source was found available, viz., the ''concen- 

 trated ammonia" obtained in drug stores, and said to contain 27 per 

 cent of ammonia in solution. It is readily seen that in the use of this 

 form it is necessary to handle practically three parts of water every time 

 one part of ammonia gas is desired. 



