INSECUTOR INSCITI^ MENSTRUUS 55 



spine being slender and not appendiculate. The outer division 

 of the lobe of side piece has two slender arms, the outer one 

 of which bears a large leaf ; the inner arm has the short fila- 

 ment apical, the long one subapical ; middle filament at base of 

 inner arm ; no others ; a seta on the stem below the outer arm. 

 Second uncal plate furcate, one limb horn-like ; no third spine ; 

 but on the slender first plate, from which the basal hooks 

 arise, is a stout spine about the middle. Basal lobes very small, 

 irregularly triangular. 



From southern California. 



Culex (Choeropcrpa) erraticus Dyar & Knab. 



Melanoconion atratus Dyar (not Theobald), Journ. N. Y. Ent. 



Soc, xiii, 26, 1905. 

 Mochlostyrax erraticus Dyar & Knab, Journ. N. Y. Ent. Soc, 



xiv, 223, 1906. 

 Culex abominator Dyar & Knab, Smiths. Misc. Colls., quart, iss., 



Hi, 257, 1909. 

 Culex abominator Thibault, Proc. Ent. Soc. Wash., xii, 20, 1910. 

 Culex abominator Coad, Can. Ent. xlv, 265, 1913. 

 Culex abominator Howard, Dyar & Knab, Mosq. N. & Cent. Am. 



& W. I., iii, 378, 1915. 

 Culex erraticus Howard, Dyar & Knab, Mosq. N. & Cent. Am. 



& W. I., iii, 382, 1915. 

 Culex (Melanoconion) erraticus Dyar & Knab, Ins. Ins. Mens., 



v., 179, 1917. 

 Culex (Choeroporpa) erraticus Dyar, Ins. Ins. Mens., vi, 104, 



1918. 



The clasp-filament is thick, ending in a stout horn, the spine 

 strong and slender ; on the outer side before tip is a horn com- 

 posed of consolidated spines, followed by a hairy area. The 

 outer division of the lobe of the side-piece has two short arms, 

 the outer bearing a very large leaf, with a small accompanying 

 seta; inner arm with the small filament apical, the large one 

 close to it, very stout and expanded by a lateral membrane ; 

 middle filament very stout. Inner division of lobe of side- 

 piece with the inner arm reduced, bearing only a slender fila- 

 ment. Second uncal plate small, furcate, one arm horn-like, 

 the other truncate ; no third spine. First plate small, without 



