1908] Calatoguc of the Genus Ala plus 193 



Types: Type No. 11937, U. S. National Museum, Washington, 

 D. C, 16 males, 5 females, (3 slides). Cotypes: Accession 

 No. 37490, Illinois State Laboratory of Natural History, 

 Urbana, Illinois, 3 males, 3 females. 



This species is very similar to Alaptus iceryae Riley females, 

 but the males are distinct. The females of the two species may, 

 however, be distinguished by the dissimilar antennal structures. 



TABLE OF SPECIES. 



This table includes those species only which have been acces- 

 sible to me or have been described sufficiently well to enable 

 diagnostic characters to be selected. 



Females. 



A. Species yellow. 



Club joint as long as the 3 apical funicle joints combined, the latter 

 oval, the 2 proximal funicle joints cyhndricab funicle 1, one- 

 third shorter than funicle 2; fore wings with 4-5 discal cilia, caecilii 



B. Species brown, or yellowish brown. 



1. Proximal funicle joints cyHndrical, slender, longer than the 

 apicals. Club joint riot as long as the 3 apical funicle joints 

 combined; the 2 apical funicle joints oval, the 3 proximal ones 

 cylindrical, slender; funicle 2 the longest joint of the funicle, 

 funicle 5 shortest, subequal to 1 ; fore wings with 2 long rows 

 of discal cilia near the costal edge, one of which is often 



obscured; no cilia in the disk or center of wing minimus 



2. Proximal frmicle joints short, stibquadrate, rectangular, 

 ovate or conic; not cylindrical and slender, or much longer 

 than the 2 apical joints; club ec^ual in length to the 3 apical 

 funicle joints, or longer. 



a. Dark brown; proximal funicle joints rectangular, the 



2 apical funicle joints unequal, funicle 5 globose, 

 much larger than funicle 1 — the shortest funicle 

 joint; funicle 2 twice the length of funicle 1 and the 

 longest of the 3 proximal funicle joints; fore wings 

 with 2 discal cilia eriococci 



b. Light brown; proximal funicle joints quadrate, the 2 



apical joints subequal, funicle 2 but one-third longer 

 than funicle 1, and intermediate in size of the three 

 proximal fvmicle joints; fore wings with a single discal 



cilium " iceryae 



3. Joints of funicle globose, the funicle moniliform, funicle joints 

 2 and 3 subequal, clvib equal in length to the 4 apical 

 funicle joints; wings with but 2 discal setae globosicornis 



C. Species black. 



Proximal ftmicle joints unequal, the second longer, the 4th and 



5th joints miich longer than the third joint pallipes 



Males. 



A. Species yellow. 



Antennal joints subequal in length, the club and funicle 1. shortest; 



fore wings with 4-5 discal cilia caecilii 



B. Species brown, or yellowish brown. 



1. Proximal segments of funicle cylindrical, slender, much longer 

 than wide. Antennal joints subequal in length, slender, the 

 ckib and funicle 1 shortest, excepting perhaps the pedicel, fun- 

 icle joints 2 and 4 longest of the flagellum; fore wings with 2 

 rows of discal cilia along the costal margin minimus 



