PUBLICATION 159 



PLATE 21 



160 



147 



148 



162 



149 



151 



MALE GENITALIA. 



147. Psorophora horridus Dyar & Knab. 



148. Psorophora pazosi Pazos. 



149. Psorophora posticatus Wiedemann. 



150. Psorophora discolor Coquillett. 



151. Psorophora pygmsea Theobald. 



152. Psorophora insularius Dyar & Knab. 



